5/16 x 1/2 Alloy Steel Socket Head Shoulder Screw (Stripper Bolt) with Nylon Insert uses a ground shoulder to guide, space, or support motion while the nylon-insert threaded end supplies prevailing torque. The ground shoulder works as the bearing, guide, pivot, spacer, or travel-control surface, while the smaller 1/4-20 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. Alloy steel suits strength-focused tooling, but the part should be kept oiled or indoors when exposure is a concern. For joints torqued once and left alone, compare plain Alloy Steel Socket Head Stripper Bolts.
Cold Headers has supplied specialty socket fasteners since 1962, with practical support for hard-to-find stripper bolt sizes. We install the locking pellet ourselves; odd sizes and special requests are welcome. Check the shoulder fit, threaded-end engagement, head clearance, and pellet location when comparing this part to an existing screw.
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
