1/4-20 x 1 1/4 Brass Button Head Socket Cap Screw is specified where engineers want a smooth exposed head, socket-drive access, and the electrical advantages of non-ferrous construction. Compared with taller head styles, the rounded button head can reduce snag potential on panels, covers, and handled surfaces. The material is often selected when conductivity, machinability, and appearance are more relevant than the strength profile of alloy steel.

Appropriate uses include electrical assemblies and control panels, where conductivity and non-magnetic construction can be useful around selected hardware and instrumentation layouts. It can also fit electronic equipment and display hardware, where a decorative appearance and lower head projection help exposed hardware look intentional. The internal hex drive supports socket-key installation in compact equipment without relying on an external wrenching surface.

For the 1/4-20 thread and 1 1/4 in. length, the reference head diameter is 0.419-0.437 in. and the head height is 0.122-0.132 in. Use the verified dimensions below when checking head projection, socket access, and replacement fit.

Technical Highlights

• Material: Brass
• Thread Size: 1/4-20
• Length: 1 1/4 in.
• Nominal Body Diameter: 1/4 (.250 in.)
• Head Diameter: 0.419-0.437 in.
• Head Height: 0.122-0.132 in.
• Hex-Key Size: 5/32 in.
• Drive Type: Internal Hex

Reference dimensions may vary slightly by manufacturer.