Button Head Cap Screw – BHCS

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.

Hexagonal socket drive

6-Lobe (Hexalobular or Torx) drive

ISO 7380-1 BHCS 6-Lobe SS-304 A2 B4A29 – Download Datasheet
ISO 7380-1 BHCS 6-Lobe SS-316 A4 B6A29 – Download Datasheet

Also available in Black Coating upon request:

ISO 7380-1 BHCS 6-Lobe SS-304 A2 Black U4A29 – Download Datasheet
ISO 7380-1 BHCS 6-Lobe SS-316 A4 Black U6A29 – Download Datasheet

Additional Material options available below on request. Higher MOQ and longer lead times may apply.

ISO 7380-1 Allen BHCS High Tensile Alloy Steel C3A04 – Download Datasheet

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Flange Button Head Allen Screw ISO-7380-2

Low profile head facilitates space saving and safety.

These are protective fasteners which provide the assembly with structural support as well as a visually appealing look. It protects the components around it from damages like scraps and unintentional cuts.

Another advantage of these screws is the large under head bearing surface – this eliminates the need for washers. The Flange distributes the pressure better.

ISO 7380-2 BHCS Flange SS-304 A2 B4A33 – Download Datasheet
ISO 7380-2 BHCS Flange SS-316 A4 B6A33 – Download Datasheet

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Flanged Button Head TORX Screw ISO-7380-2

This is an improvement on the Allen drive option and provides a more reliable slipless fixing using lesser operator effort.

The Low profile head facilitates space saving and safety.

The flange eliminates need for a washer.

Not only will this make sure even load to the target surface, this will help to prevent the screw from loosening and ensure good grip to the material in which it is fastened.

This property makes this head style suitable for fastening softer materials.

ISO 7380-2 BHCS Flange 6-Lobe SS-304 A2 B4A34 – Download Datasheet
ISO 7380-2 BHCS Flange 6-Lobe SS-316 A4 B6A34 – Download Datasheet

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USAGE NOTES.

• Install above above the surface. Make sure that the surface is level.
• Do not overtighten. Keep within the suggested Torque values. Using a Torque control tool is recommended.
• Ensure assembly using a correct tool in good condition. Worn out tools can damage the socket.