Button Head Cap Screws in SAE Steel

Button head cap screws use a low, rounded head driven by a hex key, giving a finished look and a socket that resists cam-out better than a slot or cross drive. This category collects SAE sized steel button heads in the small threads that model and hobby work depends on.

Sizes and Lengths

The range spans common machine screw threads such as 2-56 and 4-40, offered in a spread of lengths from short 1/4 inch screws up to a full inch. Having the same thread available in several lengths means you can reach through a thick mount or keep a fastener flush on a thin one without stacking washers.

The rounded profile sits close to the surface, which helps where a taller cap head would snag or look out of place, and the hex socket allows firm tightening in tight quarters.

Browse the button head cap screw sizes below to fill in your hardware drawer.