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Allen Button Head BHCS
The Socket Button Head Screw design as per ISO 7380-1 is primarily used where a lower profile head is required and for aesthetical reasons.
Button head socket cap screws combine the similar shape of a pan head with the driver of a socket head. The socket driver is ideal for low clearance applications that require a large area clamping face.
Compared to a standard socket head cap screw, button heads have a lower and wider profile which can be useful when the clamping material is too thin to counter-bore.
A button head socket cap screw’s large diameter face also helps to distribute force more evenly. They are also known as Button Head Cap Screws or BHCS.
These screws can take a lower tightening torque as compared to the DIN 912 screws.
Hence, these screws are not recommended for high demand applications.
Available in Hexagonal Socket drive and 6-Lobe (Hexalobular) drive for higher reliability.
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Allen Cap SHCS
Socket caps have a small cylindrical head with tall vertical sides. Allen (hex socket) drive is a six-sided recess [Internal Hex Socket] for use with an Allen wrench (hex key). This design is the workhorse of the machine building industry.
The most important reasons for the increasing use of socket head cap screws in industry are safety, reliability and economy. All three reasons are directly traceable to the superior performance of socket screws vs. other fasteners, and that is due to their superior strength and advanced design. Available in full thread and half thread.
Standards: DIN 912, ISO 4762, Low Head – DIN 7984
Materials: Alloy Steel, Stainless Steel – AISI 304 and AISI 316, Titanium
Size Range: M1.6 to M24 up to 200mm length. 2-56UNC to 1″
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Allen CSK
Flat head screws are used for flush mounting of sections, usually where one part slides over another or one part is mounted on another. Countersunk head screws, like button heads and low heads, are limited by configuration in their tensile strength capability. Because of this, they should not be used in applications requiring full strength, where Socket Head Cap Screws should be used.
The head angle for metric countersunk socket screws is 90 degrees up to & including M20 and 60 degrees over M20. The head angle for Imperial is different – Unified is 82 degrees and British thread forms are 90 degrees.
Usage : Machine Guards, Hinges, Covers, multiple level assemblies etc.
Available in Hexagonal socket drive and the improved 6-Lobe (Hexalobular) drive.
Allen (Hex socket) Flat Head Screws are available as per ISO 10642 (similar to DIN 7991 which is now obsolete).
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Allen Self Tapping Screws
Allen SHCS Self-Tapping Screws
Self-tapping screws are different to traditional screws as they tap their own threads when screwed into either plastic, wood or metal.
Socket caps have a small cylindrical head with tall vertical sides. Allen (hex socket) drive is a six-sided recess [Internal Hex Socket] for use with an Allen wrench (hex key). This design is the workhorse of the machine building industry.
Material:
Available in SS-304 A2 and SS-316 A4
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Aluminium Fasteners
Aluminium Fasteners – Lightweight and Strong
Aluminium fasteners have come of age. With the availability of special alloys, it has become possible to product strong and durable fasteners from Aluminium.
These have good corrosion resistance, low weight and non-magnetic properties.
They find application in aerospace, chemical, defence, robotics, nuclear, marine, petrochemical, racing car and bike bodies and engines, Drones, anodising and medical equipment industries.
Advantage of Aluminium
Get the Aluminium Advantage v/s Steel
– Lightweight; Weighs one third of steel.
– Non Magnetic and highly conductive.
– High Strength to weight ratio.
– Superior corrosion resistance when used correctly; Excellent resistance to acid-base.Available options
Aluminium Blind Rivet Nuts
Blind Rivet Nuts made from Aluminium AISI 5056 provide a lightweight nut fixing on thin sheets.
Available with Large Flange and Reduced CSK
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Black Coated Fasteners
Adding to our ever growing range are BLACK Stainless Steel Fasteners.
This finish is very useful in reducing light reflection from parts and providing an integrated finish to black coloured products and parts.
The coating reduces friction of moving parts, preventing galling and scoring.
With negligible dimensional build up, smooth screw assembly is assured.
At present, we have a wide range of black fasteners in stock including PAN Phillips and CSK Phillips screws in Metric Threads, thread forming screws, along with nuts and washers.
Other screws can also be provided in black on order.
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Button Head Torx Machine Screws 6-Lobe
The notion of a drive with hexalobular sockets are a decisive step in developing drives better adapted to manual and automated assembly. This drive is becoming increasingly popular throughout the world.
Dome Head 6-Lobe Screws as per ISO 7380-1
Also known as Torx Button Head Screw. This provides a lower profile fixing and is visually appealing.
BHCS Torx is also available in Black Finish
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Captive Screws
Captive screws basically are specially designed to lock into position in a hole, enabling easy setting up and removing of the attached pieces even without the complete removal of the screw.
A conventional screw typically passes through a clearance hole in one part and then screws into a threaded hole in a second part — so the first part is clamped to the second.
However, when the fastener is unscrewed from the threaded hole in the second component, it can easily separate from the first one.
A captive screw is designed to prevent this from occurring. It can freely rotate within the first component, with some axial movement, but it’s unable to separate from it.
USES : Captive screws are used when fasteners must remain attached to equipment, such as in cover panels. They are a requirement for several machinery safety standards.
They provide a secure joining, and avoid fastener loss or damage that might be caused by a loose part.
Captive screws come with Philips, Allen head or standard heads that are designed for usage with drill equipment and ordinary screwdrivers.
Captive screws can be found in several configurations and sizes much like the conventional screws premeditated to be utilized for large number of applications.
Material: Stainless Steel AISI-304.SS-316 on special order.
Size Range: M2 to M6 in ready stocks -
Carriage Bolts
We offer a wide range of metal bolts and studs. What is the difference between screws and bolts?
Bolts can be described as long shafts with a distinct head on one side. These are generally partially threaded. A fully threaded bolt is referred to as a screw.
Square Neck Carriage Bolts
This is known by different names such as Carriage Bolts, Coach bolts/ Round Head Square neck bolt, Mushroom Head Square neck bolt etc. Useful for fastening wood and metal together.
It is distinguished from other bolts by its shallow mushroom head followed by a square neck, while the shank cross section of the bolt is circular.
This gives the bolt its self locking feature. The square neck grips into the part being fixed preventing the head from turning when the nut is tightened.
Standard – DIN 603
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Circlips
Circlips are used to prevent lateral movement. They are used as retaining rings on bearing assemblies and are manufactured using semi-flexible metal ring. These products are in a shape of a circle with a clip and are open from one end.
Constructed as curved beams of uniform strength, the radial width is reduced towards the free ends so that a constantly round shape is maintained throughout continuous use. This form of circlip often used in assemblies subjected to strong centrifugal forces, is also secure against high rotational speeds. Lugs with holes are provided for rapid fitting or removal with circlip pliers.
Circlips now available in High Strength and Corrosion Resistance Aerospace Grade.
SS 1.4532-Aero Grade provides exceptional strength combined with Corrosion resistance that is essential for the Aerospace industry.
The following types are available:
External Circlips – DIN 471
Circlips are used to prevent lateral movement. They are used as retaining rings on bearing assemblies and are manufactured using semi-flexible metal ring. These products are in a shape of a circle with a clip and are open from one end.
The most common form of axially fitted circlips for shafts with grooves.
Constructed as curved beams of uniform strength, the radial width is reduced towards the free ends so that a constantly round shape is maintained throughout continuous use. This form of circlip often used in assemblies subjected to strong centrifugal forces; is secure against high rotational speeds. Lugs with holes are provided for rapid fitting or removal with circlip pliers.
Materials: Carbon Spring Steel – Finish: Phosphate and Oil.
Stainless Steel – 1.4122, 1.4543-Aero
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Clinch Nuts
The sheet metal surrounding the head cold flows into an undercut thereby making the fastener an integral part of the sheet.
Clinch Nuts can also be used instead of tapped holes for a more durable and stronger connection. Nuts, standoffs and studs can be used where it is not practical, or possible, to insert a fastener on both sides of a case.
For example, in an instance where there is a nut installed on the inside of an enclosure, you wouldn’t be able to hold a wrench to attach the cover, since the cover would interfere.
For the best dimensional accuracy we recommend that all holes in the sheet metal application be punched. To install the fastener into the punched Hole a profiled punch is required. It is essential that the recommended Hole tolerances be observed.
Self-Clinching Nuts provide strong reusable female threads in panels that are too thin to be conventionally tapped. Utilising a special proven clinch feature, this fastener has excellent torque-out and push-out characteristics whilst providing a flush finish on the underside of the panel.
Like all self clinching fasteners they are installed using a parallel squeezing force so require access to both sides of the panel.
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Countersunk or Flat Head Screws
SCREWS
Countersunk screws are also called Flat head or CSK screws. These screws have a flat head which tapers along the shaft.
Flat head screws are used for flush mounting of sections, usually where one part slides over another or one part is mounted on another. They are used with a countersunk hole to provide a flush, snag free fit.
Countersunk head screws, like button heads and low heads, are limited by configuration in their tensile strength capability. Because of this, they should not be used in applications requiring full strength, where Socket Head Cap Screws should be used.
Flat head screws require a matching counter in the workpiece.
The Countersunk head is preferred to obtain a flush and level finish without any projection in metal or plastic. They sink into the surface to give a smooth exterior finish.
The head angle for metric countersunk socket screws is 90 degrees up to & including M20 and 60 degrees over M20.
The head angle for Imperial is different – Unified is 82 degrees and British thread forms are 90 degrees.