5/8 x 2 3/4 Alloy Steel Socket Head Shoulder Screw (Stripper Bolt) with Nylon Insert is a nylon-insert stripper bolt for assemblies where the shoulder controls movement and the thread anchors the screw. The nylon pellet belongs in the threaded end, so it adds prevailing torque without changing the working shoulder surface. That nylon insert helps the screw resist backing out during cyclic shock, vibration, or press operation without implying permanent locking.

This format fits retrofit die repair, replacement shoulder locations, stop blocks, and travel controls, especially where service records call out both shoulder diameter and shoulder length. The nylon element limits service temperature compared to an all-metal screw; ask about plain stripper bolts for hot tooling. When the application calls for stainless material instead of alloy steel, review 18-8 Stainless Steel Stripper Bolts.

Cold Headers supports die repair, OEM sourcing, and distributor requests for uncommon shoulder lengths and nylon-insert configurations. The size callout should be matched to the travel requirement, shoulder bearing surface, tapped hole, and access for the hex key.

Technical Highlights

• Shoulder Diameter: 5/8 in. nominal; 0.623 max / 0.621 min
• Shoulder Length: 2 3/4 in.
• Thread Size and Nominal Thread Length: 1/2-13 x 3/4 in.
• Head Diameter: 0.875 max / 0.853 min
• Head Height: 0.375 max / 0.365 min
• Hex Key Size: 5/16 in.
• Material: Heat-Treated Alloy Steel
• Locking Feature: Nylon insert in threaded end, providing prevailing torque
• Nylon Insert Diameter (P): 5/32 in.
• Nylon Insert Location (N): 1/4 in. (+/-1/2 pitch)

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