5-40 x 3/8 Alloy Steel Button Head Socket Cap Screw supports compact fastening in assemblies where a cylindrical socket head would project farther from the surface. The alloy steel construction works in maintenance applications where replacement hardware must match the specified button-head geometry.
Designers often specify it for automation equipment and conveyor assemblies where the compact head profile helps protect nearby moving components. It can also serve equipment housings and assembly fixtures when the button head presents a clean bearing surface on visible hardware. Engineers often choose this style when a standard socket head cap screw would stand taller than the assembly layout allows.
When checking fit for the 5-40 thread and 3/8 in. length, the reference head diameter is 0.226-0.238 in. and the head height is 0.058-0.066 in. The nominal body diameter and hex-key information below support counterbore planning, socket access, and replacement matching.
Reference dimensions may vary slightly by manufacturer.
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
