Value Collection 225100PR Shoulder Screw 1/2 in 3/8-16 Alloy Steel

Product Description

The VALUE COLLECTION 225100PR is a hex socket shoulder screw machined from 4140 alloy steel, designed for precision fastening applications where a smooth bearing surface is required. The shoulder measures 0.5 inches in diameter and 0.5 inches in length, providing a precise locating feature for bearings, links, and pivoting components. The 3/8-16 UNC threaded section secures the fastener into a tapped hole, while the hex socket drive accepts a 1/4 inch hex key for installation in confined spaces. The head diameter is 0.75 inches and the head height is 0.3125 inches. This screw conforms to ASME/ANSI B18.3, ASTM F835, and IFI 124 standards.

Shoulder screws like the 225100PR are commonly used in mechanical assemblies, jigs, fixtures, tooling, and linkage mechanisms where a hardened, close-tolerance shaft is needed to guide or pivot a mating component. The smooth shoulder acts as a bearing journal or pivot pin, making this fastener a standard choice for maintenance technicians, machine builders, and industrial maintenance professionals working on equipment requiring repeatable alignment and controlled motion.

Key Features

• 0.5 inch shoulder diameter with 0.5 inch shoulder length for precision locating
• 4140 alloy steel construction for high strength and wear resistance
• 3/8-16 UNC threaded end for secure engagement in standard tapped holes
• 1/4 inch hex socket drive for installation in tight or recessed locations
• 0.75 inch head diameter and 0.3125 inch head height
• Meets ASME/ANSI B18.3, ASTM F835, and IFI 124 standards

Compatibility

Designed as an OEM-style replacement or standard-specification shoulder screw for mechanical assemblies, fixtures, and linkages requiring a 0.5 inch shoulder diameter and 3/8-16 UNC thread.

Installation Notes

Installation is performed by maintenance technicians or machine builders using a 1/4 inch hex key. De-energize and lock out all equipment before servicing any fastened assembly. Thread the screw into a properly tapped 3/8-16 UNC hole and tighten to the assembly specification. Do not substitute this screw in applications requiring a different shoulder diameter or thread size without verifying fitment.