5/16-18 x 7/16 Alloy Steel Button Head Socket Cap Screw is selected for socket-drive fastening where head projection, appearance, and bearing area all matter. The alloy steel construction is practical for precision assemblies that specify a compact rounded head profile and internal hex drive.

Suitable assembly locations include brackets, fixtures, and tooling assemblies where the broad head distributes contact over a wider seating area. The same head style is useful for 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 purchasing or maintenance records calling out 5/16-18 thread and 7/16 in. length, the reference head diameter is 0.527-0.547 in. and the head height is 0.152-0.166 in. The nominal body diameter and hex-key information below give engineers and buyers a quick check on fit, socket access, and replacement selection.

Technical Highlights

• Material: Alloy Steel
• Thread Size: 5/16-18
• Length: 7/16 in.
• Nominal Body Diameter: 5/16 (.312 in.)
• Head Diameter: 0.527-0.547 in.
• Head Height: 0.152-0.166 in.
• Hex-Key Size: 3/16 in.
• Drive Type: Internal Hex

Reference dimensions may vary slightly by manufacturer.

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.