Button Head Cap Screw
A button socket cap screw has a slightly domed head and is often used in applications where there’s not enough space for a standard countersink or flathead. They can be installed with a standard wrench and have a large load bearing face that distributes the clamping force evenly for better performance and less chance of embedment.
While they are often mistaken for pan head cap screws, there are several key differences that distinguish them. Pan head machine screws have straight sides and a lower profile than button head caps that make them better for applications that require less clearance or where a flush appearance is important.
Button head socket cap screws also have a recessed hexagon drive hole that fits an allen wrench or hex key for easier installation and removal. They are typically used in tight spaces and can withstand higher torque specifications than a standard phillips or slotted head screw.
They are a popular choice for use in machinery, electronics and industrial equipment due to their versatility, raised dome heads and durability. They can be used in a wide range of materials and are commonly coated with black oxide or oil for improved corrosion resistance. Accu provides a full assortment of imperial and metric button head caps in various head shapes, sizes, threading and custom options. Visit our EZ Screw Builder to learn more about how we can help you create the perfect screw for your project. Button Head Cap Screw