Value Collection 221037PR Shoulder Screw 5/16 in Alloy Steel

Product Description

The VALUE COLLECTION 221037PR is an alloy steel shoulder screw designed for precision fastening applications where a controlled shoulder diameter and length are required for alignment, pivoting, or bearing retention. The shoulder measures 0.312 inches in diameter and 1-1/4 inches in length, with a 1/4-20 UNC threaded end for secure engagement. The hex socket drive accepts a 5/32-inch hex key for installation in tight or recessed spaces. Built to Material Grade 8 and left uncoated, this screw is suited for demanding mechanical assemblies where dimensional accuracy matters. Licensed machinists, millwrights, and maintenance technicians are the typical installers.

This shoulder screw is used in jigs, fixtures, linkages, and mechanical assemblies across industrial, manufacturing, and general engineering environments. The shoulder acts as a precision bearing or pivot surface, making accurate shoulder diameter and length critical to fit and function. Sold individually, with a minimum order quantity of 25 units, making it appropriate for shop stock or production-level procurement.

Key Features

• Alloy Steel construction, Material Grade 8, for high tensile strength in demanding applications
• Shoulder diameter of 0.312 inches for precision fit in bored or reamed holes
• Shoulder length of 1-1/4 inches provides controlled spacing and pivot clearance
• 1/4-20 UNC thread standard for reliable engagement in standard tapped holes
• 5/32-inch hex socket drive for installation in confined or recessed locations
• Uncoated finish for dimensional consistency and compatibility with close-tolerance assemblies
• Meets ANSI B18.3, ASME/ANSI B18.3, and ASTM A574 standards

Compatibility

Designed as a standard shoulder screw for use in mechanical assemblies, jigs, fixtures, and linkages requiring a 5/16-inch shoulder diameter and 1-1/4-inch shoulder length with a 1/4-20 UNC threaded end.

Installation Notes

Installation requires a 5/32-inch hex key or Allen driver. Ensure the mating hole is reamed or bored to the appropriate tolerance to achieve proper shoulder fit and function. De-energize and lock out any machinery before servicing or replacing fasteners in live assemblies. Torque to specification per the assembly drawing or engineering requirement for the specific application.