3/8 x 2 1/4 Alloy Steel Socket Head Shoulder Screw (Stripper Bolt) with Nylon Insert is commonly specified where a shoulder must guide, locate, or support a moving component instead of acting only as a clamp. Engineers use this style when ordinary clamping hardware would not provide the guide, pivot, spacer, or stop function required. Typical applications include OEM production equipment, replacement hardware, tooling support, and machine repair. The nylon insert supports resistance to loosening while the shoulder continues to provide the bearing, guide, spacer, or locating surface. OEM manufacturers may specify this part where a defined shoulder supports repeatable assembly motion and controlled component location. Selection should follow the required shoulder diameter, shoulder length, material, and assembly function shown for the part. Common sourcing contexts include replacement maintenance, fixture construction, and OEM production support. Call Cold Headers at 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.