3/4 x 4 Alloy Steel Socket Head Shoulder Screw (Stripper Bolt) with Nylon Insert helps locate or guide moving parts in equipment where alignment and controlled travel are part of the design. The important engineering feature is the shoulder, which supports positioning and movement while the threaded end retains the fastener. Typical applications include conveyor equipment, assembly fixtures, spacer locations, and controlled-travel mechanisms. The nylon insert adds resistance to loosening in vibration-prone or movement-related assemblies without changing the basic shoulder function. Maintenance professionals may use this style when worn guide, stop, spacer, or pivot hardware needs a direct shoulder-size replacement. 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.