3/4 x 2 1/4 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 5/8-11 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.

The part is relevant to assembly fixtures, mold-adjacent tooling, die lifters, and controlled-travel stations because the shoulder carries interface contact and the thread locks into the tapped member. 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: 3/4 in. nominal; 0.748 max / 0.746 min
• Shoulder Length: 2 1/4 in.
• Thread Size and Nominal Thread Length: 5/8-11 x 7/8 in.
• Head Diameter: 1.000 max / 0.977 min
• Head Height: 0.500 max / 0.490 min
• Hex Key Size: 3/8 in.
• Material: Heat-Treated Alloy Steel
• Locking Feature: Nylon insert in threaded end, providing prevailing torque
• Nylon Insert Diameter (P): 3/16 in.
• Nylon Insert Location (N): 5/16 in. (+/-1/2 pitch)

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