The Button Head Bolt is often used when appearance is important or where clamping material is too thin to countersink the screw. It has a low domed head that offers a wider load bearing surface and is less likely to snag on moving machinery. It also allows for a higher torque specification than a socket cap screw.
While button head bolts are more visually aesthetic, they have their own set of challenges that must be addressed in order to use them successfully. The larger surface area on the head makes it susceptible to loosening, which can cause damage to the screw or machine if not properly managed. This can be overcome by using threadlock or by not over tightening. Additionally, it is recommended to use a tool with a good grip and not one that is worn out, as this will cause the bolt to loosen and possibly damage the equipment.
Metric & Multistandard Components Corp carries both ISO 7380 button socket head cap screws and ISO 7380-2 button flange socket head cap screws. Both of these fasteners host a hexagonal drive hole and are tightened with an Allen wrench (hex key). They are available in a variety of sizes, materials, finishes and thread options.
They are ideal for industrial and automotive applications as they have a wide load bearing surface and can hold more torque than standard socket screws. They are also resistant to loosening and are able to be driven with power drivers. Button Head Bolt