5/8 x 3 Alloy Steel Socket Head Shoulder Screw (Stripper Bolt) with Nylon Insert helps replace or specify a shoulder screw where die travel, fixture spacing, or guided motion depends on exact size. The ground shoulder works as the bearing, guide, pivot, spacer, or travel-control surface, while the smaller 1/2-13 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.

Designers often review this size for fixture plates, sliding elements, controlled stand-off points, and repair programs where a plain threaded screw would not provide a proper guide or pivot surface. A 5/8 in. shoulder measures 0.621-0.623 in.; it is sized to slide and pivot, not press into the mating component. For metric die sets, compare Metric Socket Head Stripper Bolts instead of converting inch shoulder sizes.

For maintenance and toolroom sourcing, Cold Headers helps match exact shoulder dimensions rather than forcing a near-size substitute. Before ordering, compare the drawing to the shoulder size, thread size, head envelope, hex key, and nylon pellet placement.

Technical Highlights

• Shoulder Diameter: 5/8 in. nominal; 0.623 max / 0.621 min
• Shoulder Length: 3 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.