For drawings calling out a locking button head socket screw, the 5/16-18 x 1 Alloy Steel Button Head Socket Cap Screw with Nylon Insert keeps exact thread and length identification clear. The insert provides a prevailing-torque feature while preserving the compact top-side tool access expected from an internal hex button head screw.

The button head profile offers reduced head projection, a smooth exposed appearance, and a broad bearing surface compared with a standard cylindrical socket head. In maintenance repairs, replacement assemblies, and retrofit work, the internal hex socket drive allows tool access from above while the nylon insert adds frictional resistance at the threads. Engineers should confirm that the selected size, low-profile button head, and insert behavior match the assembly before substituting from a non-locking screw.

Cold Headers has supplied specialty socket fasteners since 1962 and supports exact-size sourcing for difficult-to-find socket products. For adjacent selections, buyers often compare 18-8 Stainless Button Head Socket Cap Screws, 316 Stainless Button Head Socket Cap Screws, and related locking fasteners when checking head style, material, locking feature, thread size, or nearby lengths.

Technical Highlights

• Material: Alloy Steel
• Thread Size: 5/16-18
• Length: 1 in.
• Head Style: Button Head
• Drive Type: Internal Hex Socket
• Locking Feature: Nylon insert providing prevailing torque

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