4-40 x 5/8 Alloy Steel Button Head Socket Cap Screw gives equipment builders a rounded button-head form for visible or frequently handled fastening points. The alloy steel construction is used on industrial equipment where exposed hardware benefits from a rounded head and socket drive.
This configuration is practical for production machinery and maintenance repair where socket engagement is practical where side clearance is limited. It also works in production machinery and maintenance repair when socket engagement is practical where side clearance is limited. Selection is usually driven by head shape, socket access, and exposed-surface requirements rather than by the geometry of a standard socket head cap screw.
For engineering layouts using 4-40 thread and 5/8 in. length, the reference head diameter is 0.201-0.213 in. and the head height is 0.051-0.059 in. The nominal body diameter and hex-key information below keep fit review, tool selection, and replacement ordering tied to verified reference values.
Reference dimensions may vary slightly by manufacturer.
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
