Category: Screws

How to Choose the Best Pan Head Brass Machine Screws

A pan head brass machine screw is mostly used to fasten heavy-duty machine parts, and therefore, choosing the right kind of fastener is always crucial. A wrong choice may either alter the functionality of the machine or even create any risk in the long run.

Pan head brass machine screws

The dimension and thickness of these machine fasteners are the preliminary factors to be considered, while purchasing. It’s highly important to check-out the length and even the thickness, so that they should be long enough to fasten various machine parts and keep them intact.

These special kinds of screws are available in various materials and compositions in the market, such as stainless steel, steel, brass and nylon, and accordingly, these are used as per the requirements. Besides, various machines screws feature different head shapes, such as Phillips head, slotted head etc. And thus, you will also require different types of drill and screwdrivers, which are suitable for these fasteners. Plus, these also come with pan, hex and flat heads.

Machine screws head and drive types

Difference between pan head screws and pan head bolts is that the pan head screws do not have to feature a bolt thread specification, so as to accept a non-tapered nut.

While choosing pan head brass machine screws, you should also determine about the pieces, you’re willing to join together. By determining the length of the pieces, the length of those screws should be chosen.

Dimensional View of pan head machine screw

Apart from considering the thickness, head type and dimension, you should now check-out how much stress the machine parts are going to encounter, when they’ll be used. Therefore, you should always go for screws, which are slightly longer than the adjoining pieces, so as to ensure that a nut can be easily placed on the other end of the rivet to adhere them.

A machine screw is composed of various materials. Most of the ingredients are made from metals, including brass, steel and copper and also features nylon and plastic and thus each type features definite strength, magnetic and rust resistance and durability. You should therefore, select rivets considering their composition and your requirements.

Machine screws clear Dimenctions

In the same way, screwdrivers or drills are chosen accordingly, which are suitable for your chosen screws.

You can always take the help of online experts in case you’re facing any difficulty in selecting a definite design to get your job done.

Top 15 Questions about Screws Answered

Here are the top 15 sought-after questions on screws answered. Do have a read!

1. What are capture screws?

Such types of fasteners feature a clip at their end, so as to prevent them from falling out once they are unscrewed. Each of the two large fasteners, which maintain the action to the stock, features a smaller lock screw, thereby preventing the action screws from getting detached.

Quite often, you would have noticed the K98s being advertised with a capture screw. Essentially, such kind of rivet holds another screw on the floor plate of a Mauser. By flipping the K98 over, you can see the lag that holds the floor plate has two holes for screws. One goes in first, enabling a cut out recess for another to get inserted, and even ensuring that it doesn’t come out.

2. What are grabber screws?

These fasteners were actually launched by Grabber, the world?s largest manufacturer of drywall screws and fasteners mostly designed for interior finishing.

3. Can screws be used instead of nails in wood frame construction?

Yes, screws can be used instead of nails, but not in all situations. However, screws have 300 times more holding power and their threads cut deep and deform wood to intact tightly, whereas nails by gripping due to friction becomes loose mostly when wood shrinks and may pop-up its head above surface, thereby creating a call-back in a drywall situation.

“We agree with the old saying, “they don’t build ’em like they used to,” when it is used in the context of comparing modern day construction to that of yesteryear. Today they build ’em better. Times have changed and the screw has taken its place among better builders as the fastener of choice. Screws are particularly effective for applying wallboard to a wall that has lath and plaster or tile on the other side that could otherwise be jarred by hammering. However, beginners will always require a screw gun.”

4. How to snap off screws?

Snap off deck screws, commonly known as counter snap screws, gives you a finishing nail look, while you drill them in place. These kinds of fasteners are quite ideal for those who are quite particular about the look of their finished deck, as they give a more clean appearance on the surface.

Methods to snap off screws

Step 1 – Mark the Spot – Once you insert a snap off head screw into your deck, you won’t be able to remove it easily so as to change the placement. For this, you need to make sure that you have the areas marked exactly where you are going to place them.

Step 2 – Place the Fixture – After marking the spot, you’ll now have to set the fixture directly above the spot. Now place the screw on the top of the fixture and slowly drill the fastener in to place. As the stress builds on the lag from the fixture, the screw will snap off at the countersunk score.

Step 3 – Remove the Fixture – Now remove the fixture from the spot, and by doing this, the screw head will fall. Simply toss this out and can now stuff the leftover hole with wood putty if you wish.

5. What are screws made of wood called?

Screws made up of wood are known as chipboard screws, which are usually made up of resin and wood dust or even wood chips. Such kind of rivet is also known as particleboard screw and is a self-tapping screw with a thin shaft and coarse threads.

6. How to make it easier to screw in screws?

You can start with this: – Keep the bit aligned with the direction, in which the screw is going to be inserted. Many times we see newbies struggling with this particular situation. If the drill/chuck is perked up in context to the axis of the screw then it creates all sorts of trouble. So, you need to firmly push it inward, thereby not letting the bit slips back out of the screw head.

Bits are quite exhaustible and they don’t last forever. So choose carefully.

7. What size and thread are the screws used to install outlet receptacles?

For plug switch boxes- 6×32

For fixture boxes- 8×32 or 10×32

8. What screws do you use to hang a cabinet?

Well, this won’t make any sense if we mention a particular type of screw suitable to hang a cabinet. Cabinets are available in various types and materials, and there isn’t one size or particular type of screw that works for all of them. It wasn’t that long ago when most of the carpenters were seen opting drywall screws for installing the cabinets. Such fasteners aren’t designed for fastening two wooden surfaces and are not ideal for bassinets with heavy, concentrated loads produced due to dishes and glassware. If someone suggests you to use drywall screws then disregard that advice.

Also, consider if you are using recycled cabinets. Using screw holes from the previous installation is also not advisable. By driving a screw into an existing hole you can hit a snapped-off fastener, which would be lurking there, or may even find that the original installation was messy and by using those holes cabinet face frames out of line. So, instead create fresh pilot holes and cover the old ones with tinted wood filler such as Color Putty.

Mutual Screw and Supply for example sells specialized screws, which are appropriate for fastening kitchen cabinets to the wall. These fasteners are available in different names: washer-head cabinet screw, cabinet screw, washer-head screw and button-head screw. Their huge-diameter heads bear down firmly on the cabinet’s hanging rail, thereby ensuring a solid installation.

9. What kind of screws should be used to install plastic baseboard?

Stainless steel screws are mostly used to install plastic baseboard.

Method

Set the trim against the wall in the desired location and then drill stainless steel screws through the trim into the wood stud, so as to secure the moulding against the wall. Now countersink the screws, while drilling a bit below the trim and hide the screw heads by filling them using a putty knife and paintable caulk or filler.

10. What type of screws should I use for plastic?

Self-tapping screws are recommended for plastic. These are the most commonly used fasteners for binding all sorts of objects. They form a thread while getting inserted, thereby eliminating the requirement of a separate tapping operation.

These are available in two types; thread-cutting and thread forming.

Plastic materials, whose flex modulus’ value is above 7000 MPa are usually brittle and tend to crumble between the threads, thereby causing the fastener to pull out at lower than predicted force values. For these materials, we recommend you to go for finer threads of the Type T screw.

11. What size screws to wall mount 70 inch TV?

The bolts you will need are as follows: M8-1.25 X 20. 20 is the length that I used and it works well. You could also use 25 if you would like.

Hole pattern (width x height):

  1. 200mm x 200mm or
  2. 280mm x 150mm or
  3. 400mm x 400mm or
  4. 600mm x 200mm or
  5. 600mm x 400mm or
  6. 800mm x 400mm

Screw Type (metric):

  • M6 x 4 or
  • M8 x 4

Screw size will always be listed in the owner/operation manual. Too long of a screw can damage the TV.

12. What type of threads do bleeder screws have?

Just for future searchers. After making a deep research and practically measuring them here is what we have come up with. Not sure what the cut-off date but during 2002, WRX’s used to have M7 x 1.0 tread bleeders. Some later models started featuring both M10 x 1.0 and M7 x 1.0. You’ll need a 10 mm wrench for M10 x 1.0 type.

13. What type of screws is used in a emx prx-320?

Hex head cap mounting screws are used in an emx prx-320

The installation procedure:

14. What type of screws for lead flashing?

Flush Head socket type set screws is used for lead flashing.

15. Set screws are commonly used in?

A set screw is a type of hardware, specially designed to fasten one object within another. This particular rivet prevents relative movement between the two binding objects, thereby enabling each one to function as intended. It is usually made up of brass or stainless steel, and is fashioned to pass through the outer object and rest against the inner object without actually passing through. In UK, this particular fastening device is known as ‘Grub screw’.
It is usually fastened by using an internal mechanism rather than a traditional external head. The top of this screw may be slotted for use with a screwdriver, or may even feature a hexagonal shape. While slotted screws are easy to use and do not require any special tools, the hexagonal set screws are subject to higher torque for a tighter connection and requires the use of special tool such as Allen wrenches.

A set screw is used in a variety of applications. One of the most commonly used applications is in doorknobs or lever locks. The handle or knob is fastened to the door and covered with a separate plate, which is known as a “rose.” A set screw is placed through this plate to prevent it from spinning around the handle or knob mechanism. These screws are also used in various industrial and mechanical devices, especially rotating items such as pulleys or wheels.

An Insight into Our Galvanized U Bolts

As the name suggests, U bolt looks like the letter U, featuring two threaded arms suspending from a curved base. It is available in numerous sizes and features various applications and uses.

The galvanized U bolts undergo a chemical process to protect themselves from corroding and rusting. Such fasteners get coated in layers with ZnO (Zinc Oxide). This kind of coating prevents these metal pieces from getting corroded. Besides, the coating renders a longer life to the rivets, durability to withstand wear & tear and a glossy finish, thereby making them attractive.

In simple words, galvanized U bolt is a rod, being threaded at both ends and bent to form a ‘U’ shape. These types of bolts are usually found with a smooth curve, specially designed to accommodate a cylinder; for instance, the axle or exhaust tubing.

 

There are certain U bolts featuring a squared off shape, are specially manufactured to fasten flat bases such as wooden blocks, square tubing or any other kind of flat layers. Sometimes, the ends of the bolts feature a bar/crossed member drilled with holes, which slide over the open ends to enclose them.

Sometimes, the ends of the bolts feature a bar/crossed member drilled with holes, which slide over the open ends to enclose them.

Keeping a few pieces of galvanized U bolts around the house can be useful for home owners who are planning to go for home renovation projects, as these coated rivets are versatile enough to match various applications and also helpful in surprise settings.

At Mutual Screw and Supply, we offer both hot dipped galvanized U bolts as well as stainless steel U bolts, to satisfy varied industry requirements. Click here to know more.

These types of bolts are designed to meet an extensive range of applications, including domestic, commercial, construction, marine, off-shore, automobiles and various other industry requirements. We offer these metal pieces in various configurations, materials and gages so as to meet those above mentioned requirements.

Uses 

Like in automobiles, our hot dipped galvanized U bolts are used in numerous applications. For instance, they are used to attach springs to the rear axles and front of the heavy-duty trucks, off-road trucks and cars. These fasteners are used to attach truck parts to the frames and are used in ringing applications and anything which requires a clamping force between two pieces.

These fasteners are used to attach truck parts to the frames and are used in ringing applications and anything which requires a clamping force between two pieces.

The U-shape of these rivets help them keep firmly in desired position, thereby preventing the object to easily get pulled away from its fittings. This further leads to inducing durability and safety.

Apart from stainless steel and galvanized pieces, we also deal with steel zinc plated, aluminum, black oxide, plain finish etc.

 

The threaded ends of the galvanized U bolts are designed to get along with screws and washers. Some people are also seen using a cross-piece, spanning both the ends so as to make the fastener secure in particular settings and applications.

Like other bolts, these pieces are also manufactured to get into any pre-drilled or pilot holes. The U bolts are most commonly used in fastening various pieces to beams and poles, mostly in houses. These pieces help in suspending any object from the utility pole. In such cases, the U bolts are used along-with cross-pieces which snag the bolt in place.

 

Besides our bolts are also used to pass cables across the walls. While both the ends are inserted into the walls, the U face holds the cables or any other flat materials against the wall.

However, depending upon the type of application, the size and grade of the bolt should be chosen, in order to eliminate any work-arounds later. And if you are willing to use them in corrosive or humid environment then our hot dipped galvanized U bolts work best for you.

Particle Board Screws: Idea for Installing Soft Wooden Floors

Particle board is a composite wood, made up of a combination of wood chips, such as sawmill shavings, synthetic resin, any suitable binder, wooden chips and saw dust. It is also known as ‘clip board’ and is the engineered wood, as it is not naturally extracted from trees. For such kind of furniture, special kinds of fastener known as particle board screws are used.

Particle board screws

Considering various requirements, the hardware supply industry offers different types of screws. So, it’s always crucial to know what the exact type of screw, which best suits your requirement. As in the case of the clipboard – if you use any other screw then you may easily end up damaging the surface of the board. After considering the type, it is now required to know the exact size.

The adhesive present in the chipboard is usually a kind of resin that is adhered together with wooden chips to create boards of different density. Although chip board’s high density factor is quite strong, still it is known as ‘soft wood’ and is less permeable to moisture. This kind of artificial wood is lot cheaper than the natural furniture and this is the major reason for its popularity. While natural wood’s price is soaring high these days, you can easily fetch the engineered wood at quite cheaper rates, plus it has distinct advantages as compared to the normal one.

These days it is also used for flooring in kitchen and cabinets and it is easily deceived because of the coating of the melamine. And for the installation process, the particle board screws are definitely required. Such types of fasteners are thus heavily used in the interior works and are now most frequently bought on bulk amounts.

If you go online, you would be bombarded with an array of web stores dealing with such items. You may get confused, so let’s help you with this. The Mutual Screw and Supply is a well-known fastener company, who can help you fetch your desired stuff at quite affordable rates.

Thread Rolling Screws: Helping Bolts Impress into the Raw Stock

The self-tapping or thread-rolling screws are those types of fasteners, which feature threads, specially designed to tap in their own holes. Such types of rivets are ideal for fastening objects in softer materials such as plastic and wood, but do not suit at all for harder materials such as metal.

Thread rolling is a type of fastening procedure, which involves penetrating bolts threads into the raw stock instead of cutting them. This procedure requires a sturdy steel tool to be formed in the shape of the necessary thread. The raw and uneven stock is spun at a definite rate; simultaneously the tool bit is pressed against it with high pressure. Thus, the shape of the screw thread is efficiently placed upon the stock base.

The tool bit is constantly put under pressure and is moved towards the stock, till the full-depth threads are created. The thread forming process is bit cheaper as compared to the thread cutting, thereby yielding durable and safer end results.   Fasteners, such as screws, nuts and bolts are the most commonly used rivets in the world, with ample quantities produced across the world every year. These rivets are generally yielded from raw metal stock, which is created prior to the introduction of threads. Basically, there are two steps involved in forming the threads; thread rolling and thread cutting.

The thread cutting procedure involves a cutting die, which is moved up the length of the rotating stock, thereby cutting away the metal surface to create the threads. Although this process is effective, it is always time-consuming.

The thread rolling screws on the other hand is a better application in various aspects. In this method, a sturdy tool bit is used to insert the threads into the stock surface. The tool bit is formed in the shape of the threads and with great pressure; it is then forced against the stock.

Basic Difference between Metal Screws and Wood Screws

Fasteners such as screws are extensively used in hardware industries and they are available in huge varieties and patterns, so as to meet various industry requirements. Many people carry a notion that screws are all the same. But if you visit any online hardware supply store, such as Mutual Screw and Supply, you would learn that these fasteners are available in various designs and each one of them features distinct functionality.

You can only settle down for a particular hardware item, which meets your requirement, provided you understand the basic difference between various screws, say metal screws vs wood screws. Many people would assume that the basic difference lies in their materials. But this is not entirely true, as the metal rivets can also be used in wooden and fiber glass surfaces and the wood fasteners can also be used in surfaces other than furniture. However, their main difference lies in their features and designs.

Threads

You can site a major difference in their threading pattern. These two rivets are threaded differently. While the sheet metal fasteners are benumbed and are threaded on the entire body, the wooden rivets are comparatively soft and feature a tapered shank. The threading on metal ones is available up to 3 inches and the wooden ones feature threading up to 1 inch. The sheet metal screws flaunt a straight shank along-with a finer threading pattern other than the wooden rivets, which are threaded only two-thirds of the way up.

Pitches

Pitch refers to the number of threads per inch. The metal rivets feature number of pitches than the wooden ones, which indicates that they feature a coarser pitch. In case of the wooden screws, the top portion is often not threaded, thereby enabling the rivet to be popped up from the surface.

Uses

The metal fasteners can also be used in furniture pieces, whereas wooden screws are not ideal to be used in metal surfaces. The metal screws are ideal for self-tapping. (Self-tapping means that the fastener can create its own threading as it advances through the material). These self-tapped rivets are used in plastics, fiber-glass and plywood, whereas in wooden screws, self-tapping is not possible. These fasteners are used in outdoor building structures such as decks and fences.

Sex Screws: Highly in Demand for Their Low Profile Knurling Features

sex screw, which is also known as barrel nut or barrel bolt and even Chicago screw at times, is a type of fastener that features a barrel shaped nozzle and a protruding boss, which is threaded internally (a boss is basically an extended feature on a work piece).

This protruding feature is placed within the components, which need to be fastened, while the rivet’s flange enables the bearing surface.

Chicago ScrewThe barrel nut and its accompanying machine screw enables flush on both sides of the surface, which are tightened. Such kinds of bolts are much in demand, most probably because of their low profile as compared to other bolts.

The Chicago screw usually possesses a built-in feature, like a slot, which helps in securing any fastener.

Sex screws are used in bolting applications, mostly in situation which demand to have a head on both sides of the joint. The sex bolt is enabled with a female thread, thereby enabling it to meet with the bottom of a standard bolt and connect.

There are some sex bolts, which are also known as architectural bolts and feature knurled cylindrical containers. Knurling is commonly a manufacturing terminology, used when a process is typically carried out on a lathe and a diamond shape pattern is cut into metal.

Such kind of rivets are also used in binding posts, which are quite similar to architectural bolts, because of their special designs, which are fashioned to be assembled from one side. in addition to, they have also got teeth on the flanged base, which are helpful in fastening.

Stainless steel sex boltsThese metal pieces were originally produced for the printing industry, so as to bind huge catalogs together. But now, with their multi-faceted features, they are also used in numerous other ways.

The stainless steel sex screws usually feature combo truss head, which are usually broad with a low profile rounded cap. These are a combination of rivets, which feature both slot as well as X shaped cells for use and can be easily used by a Phillips head or flat bladed screw driver.

The Chicago screws can be easily fetched online. The Mutual Screw and Supply is an ideal destination to look for all sorts of fasteners. Browse through the product page to find more!

Only Your Thumb is Sufficient to Fasten the Thumb Screws

A thumb screw a kind of fastener, which features an over-sized head with a diamond-shaped or knurled anchor finish along-with large wing like blades, thereby enabling the screw to be used as per the requirement.

Thumb screw

Such kind of rivet is used in applications, where any object may need frequent re-installations, as it is in the case of the safety cover or in case of various electronic devices. In such cases, such kind of fastener makes it possible for you to easily remove it by just twisting it with your thumb and forefinger.

In most of the application, the thumb screw is used as a bolt. While a screw by nature is usually pointed in shape and is used to develop its own threads when inserted into sheet metal or wood, the thumb screw features a blunt-nosed bolt, which is tightened into any threaded hole. The basic advantage is that it renders easy installation and removal processes without any help of tools, as it is with the case of other screws.

A Thumb Screw Side View

The battery cover and other certain electronic devices use such kind of rivet. You would have often heard that the thumb screw is captured – it means that bolt of this rivet once loosened, it won’t fall out of the cover. This particular rivet uses a washer, which is set in place to sustain the metal piece in the cover. This is a handy hardware supply, thereby preventing the locking screw from getting lost.

It is available in various designs, which incorporate a Phillips or flat screwdriver into the fastener. This helps the rivet to be easily fastened by a wrench even and if not then it can be still tightened by finger. In heavy-duty applications, such as in boats and off-road vehicles, it is highly recommended because of its tendency to get loosened over time. In case of the fasteners, featuring knurled heads, it is possible to attach the screw with a pair of pilers, so as to ensure accurate torque implementation.

Different Types of Screws and their Uses

Before elaborating the different types of screws available today in the market, let us first of all have a quick review on its definition.

So what is a screw?

A screw/bolt is a type of fastener distinguished by a circular ridge, known as threads which are wrapped around a cylinder.

While some screw threads are designed to get along with an internal thread, also known as complementary thread, there are some threads, which are fashioned to cut a helical groove in a softer material, say wood or plywood, when the fastener is inserted. The major function of a screw is to hold two objects together.

These kinds of fasteners are astonishingly versatile and powerful enough to be hold two different surfaces intact. The basic concept behind such metal objects’ functionality is their threaded cylindrical parts, which are designed to get inserted into any kind of material, be it a plastic, wood, metal or plywood. However, there are various types of screws available suitable for distinct surfaces.

These types can be distinguished depending upon the driving methods, job requirement, head shape, type of threads and material used to make such metal pieces. Have a look!

Driving Methods


Slotted: The heads of such fasteners are most probably the most ancient and commonly used variety. The linear slot in the screw’s head is easily gets along-with any standard screw driver, such as the flat-head screwdriver.

Phillips: These are the enhanced forms of slotted ones. Their cross-shaped laps, which are not continuous up to the edge, will certainly require a Phillips-head screwdriver. The heads of such rivets, featuring a circular shape, enables a larger mating surface, thereby reducing the chances of wear and tear. Plus, they also prevent the chances of slipping. A cross head usually features 2 full-length slots, which can only work with a flat-head screwdriver.

Square: This type is also known as Robertson screw head and features a square dent to reduce the chances of slipping. It requires a special kind of driver for its usage.

Hex: This is again available in two designs. Such types of fasteners either feature a hexagonal recession in the head or do not have grooves at all. The hex socket screw/Allen screw requires an Allen wrench, featuring a hexagonal shaft and the other type of hex screw’s head is completely hexagonal in shape. A socket wrench is required to tighten or loosen it.

Apart from being available in above mentioned types, the screws are also available in various materials. While some are made up of steel and stainless steel, there are fasteners, which are made up of brass, nylon, aluminium and are also available with zinc and black-oxide coating.

Torx Screw Sizes and their Properties

Torx head is a kind of fastener, which uses a 6 pointed design rather than a Phillips cross or age-old slot design. The shape of the head of this rivet looks like a star and hence, it is also referred to as tar screwdriver or star bits. The more specified generic name given by International Organization for Standardization is  hexalobular internal.

History 

Torx was invented by Camcar Textron in 1967. Earlier, these kinds of screws were sometimes used in applications, which required tamper-resistance feature, as the screwdrivers were not widely used. However, these days, they are widely used in automobiles, bicycle brake systems, motorocycles, consumer electronics, hard disk drives etc. These are now increasingly becoming popular in construction hardware as well.

 

Benefits

The torx screws are better than Phillips head types, as these can withstand more cam-out as compared to Phillips heads. While Phillips heads are designed to make the drive cam-out, the Torx heads are designed to prevent the cam-out. The driver design of this particular fastener as compared to others applies desirable torque consistently, thereby increasing the life of the tool by ten times.

Sizing

The Torx screw sizes are mainly referred by capital letter “T” and the small number along-with it refers to the point-to-point dimension of the screw head. USual sizes commonly found in market include T10, T15 and T25.

Sizing is a relevant factor to be considered while going for these star bits, as an accurate driver can only drive a particualr head size without damaging the rivet or the driver. The above described Torx head sizes are used in application with metric, SAE and other kind of thread systems. This ultimately reduces the bit sizes, thus making them function in a more effective manner.

These fasteners are also tagged by “E“. The E & T are coreelated to each other, for instance, E4 Torx socket fits in with a T20 head. Below is a chat mentioning properties of various Torx drives. Do have a look!

Alternatives

  

Security Torx, which is also known as Tamper-Resistant Torx or pin-in-Torx is a variant to Torx head. It features a post in the middle of the head, thereby preventing a commonly used Torx driver from being used applied.

There’s another variant known as external Torx, whose head resembles the shape of Torx screwdriver bit. It requires a special kind of socket to drive it. There are basically used in transmissions and automobile engines.

Resource :

1. Torx screw  and screw drive types.