1/4 x 4 Alloy Steel Socket Head Shoulder Screw (Stripper Bolt) with Nylon Insert is built for applications where a stripper bolt must carry motion while remaining seated in the tapped member. The ground shoulder works as the bearing, guide, pivot, spacer, or travel-control surface, while the smaller 10-24 threaded end anchors into the die shoe or fixture. That nylon insert helps the screw resist backing out during cyclic shock, vibration, or press operation without implying permanent locking.

In progressive dies, stripper plate return, guide pins, and die-shoe repair, the shoulder length helps establish travel or stand-off while the smaller 10-24 thread retains the screw. 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: 1/4 in. nominal; 0.248 max / 0.246 min
• Shoulder Length: 4 in.
• Thread Size and Nominal Thread Length: 10-24 x 3/8 in.
• Head Diameter: 0.375 max / 0.357 min
• Head Height: 0.188 max / 0.177 min
• Hex Key Size: 1/8 in.
• Material: Heat-Treated Alloy Steel
• Locking Feature: Nylon insert in threaded end, providing prevailing torque
• Nylon Insert Diameter (P): 3/32 in.
• Nylon Insert Location (N): 5/32 in. (+/-1/2 pitch)

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