3/8 x 3/8 Alloy Steel Socket Head Shoulder Screw (Stripper Bolt) with Nylon Insert is used when a socket head shoulder screw must provide both a bearing surface and prevailing torque retention. In stripper-bolt service, the shoulder sets motion or stand-off while the threaded end secures the assembly into the tapped member. That nylon insert helps the screw resist backing out during cyclic shock, vibration, or press operation without implying permanent locking.

Specify this configuration for guided carriers, plate stops, linkage supports, and maintenance replacement assemblies when top-side socket access and a consistent shoulder surface are both important. Because the pellet is in the threaded end, it does not change the shoulder's guiding or bearing function.

Use Cold Headers when a drawing, service record, or die book calls for a specific stripper bolt size that is not easy to source. Review the shoulder diameter, shoulder length, thread, head dimensions, hex key, and pellet location before matching a print.

Technical Highlights

• Shoulder Diameter: 3/8 in. nominal; 0.373 max / 0.371 min
• Shoulder Length: 3/8 in.
• Thread Size and Nominal Thread Length: 5/16-18 x 1/2 in.
• Head Diameter: 0.562 max / 0.543 min
• Head Height: 0.250 max / 0.240 min
• Hex Key Size: 3/16 in.
• Material: Heat-Treated Alloy Steel
• Locking Feature: Nylon insert in threaded end, providing prevailing torque
• Nylon Insert Diameter (P): 1/8 in.
• Nylon Insert Location (N): 13/64 in. (+/-1/2 pitch)

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