4-40 x 1/4 Alloy Steel Button Head Socket Cap Screw provides a button-head geometry for assemblies that need a finished appearance and internal hex drive engagement. The alloy steel construction is selected for production equipment where a lower-profile head is preferred on exposed fastening points.
Engineers may use it on brackets, fixtures, and tooling assemblies where the broad head distributes contact over a wider seating area. This geometry also fits brackets, fixtures, and tooling assemblies when the broad head distributes contact over a wider seating area. 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 drawings using the 4-40 thread and 1/4 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 support fit checks, tool access planning, and replacement verification.
Reference dimensions may vary slightly by manufacturer.
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
