ASME B18.3.4M Metric Series Button Head Socket Cap Screws by Material, Finish and Size

Button Head Socket Cap Screws are commonly used in machine parts, die fixturing, and clamping. The socket head enables driving where there is not sufficient space for wrenches or sockets. The button shaped head offer a wider bearing surface. Button head socket cap screws have a high tensile strength but are still low profile. They are covered by ASME B18.3

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Button head socket cap screws are a type of cap screw that has a hexagonal socket and a rounded button-shaped head. An allen wrench or hex key is used to tighten the button head socket cap screw. Most button-socket cap screws feature clean heads with no stamping or marking for a nice clean finished look. Button Socket Heads can be tightened to much higher torque requirements than slotted or cross recessed drive machine screws since they are tightened with a hexagon shaped key.
Common applications of Button Head Cap Screws are:

• • Automotive
• • Electronics
• • Machinery

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