5/16-18 x 1 1/2 316 Stainless Steel Button Head Socket Cap Screw provides a rounded button-head form for assemblies that need lower head projection while keeping the head visible and accessible. The button-head design gives engineers a compact rounded profile, a broad bearing surface, and internal hex drive access, while the 316 stainless steel material is selected where additional corrosion resistance is needed compared with general-purpose stainless grades.Typical applications include packaging machinery and industrial automation, where reduced head projection helps limit interference near guards, rails, and moving components. It can also serve high-humidity equipment and valve enclosures, where the head geometry keeps exposed hardware smooth while preserving socket access. The button-head geometry is different from a standard socket head cap screw: it keeps a lower, rounded profile while still providing socket engagement.
For the 5/16-18 thread and 1 1/2 in. length, the reference head diameter is 0.527-0.547 in. and the head height is 0.152-0.166 in. Use the verified head dimensions below when checking surface projection, socket access, and replacement fit.
Technical Highlights
- Material: 316 Stainless Steel
- Thread Size: 5/16-18
- Length: 1 1/2 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.
