Value Collection 221025P Shoulder Screw 5/16 in Alloy Steel

Product Description

The VALUE COLLECTION 221025P is an alloy steel shoulder screw designed for precision fastening applications where a fixed-diameter bearing surface is required. The shoulder measures 0.312 inches in diameter and 1/2 inch in length, providing a smooth, hardened pivot or spacer surface between mated components. A 1/4-20 UNC threaded shank locks the fastener in place. Drive engagement is through a 5/32 inch hex socket recess in a rounded head. Manufactured to Grade 8 material specification and compliant with ANSI B18.3 and ASTM A574 standards, this screw suits demanding mechanical assemblies where dimensional consistency and shear strength are critical.

Shoulder screws of this type are commonly installed in jigs, fixtures, linkages, and pivot assemblies across industrial, mechanical, and trade applications. The uncoated alloy steel construction is appropriate for indoor or controlled-environment use where corrosion exposure is limited. This screw is typically installed by machinists, maintenance technicians, or mechanical contractors working on precision equipment, tooling, or actuator linkages. The minimum order quantity is 25 pieces.

Key Features

• Shoulder diameter of 0.312 inches provides a precise bearing surface for pivots and spacers
• 1/2 inch shoulder length suits standard fixture and linkage stack-ups
• 1/4-20 UNC threaded shank for secure engagement with standard tapped holes
• 5/32 inch hex socket drive for torque application in confined spaces
• Grade 8 alloy steel construction meets ANSI B18.3, ASME/ANSI B18.3, and ASTM A574 standards
• Uncoated finish — suitable for applications where additional coatings or platings are applied post-installation

Compatibility

Designed as a standard ANSI B18.3 shoulder screw for use in precision mechanical assemblies, jigs, fixtures, and pivot linkages that require a 5/16 inch shoulder diameter and 1/4-20 UNC threaded engagement.

Installation Notes

Installation is performed by qualified machinists or mechanical technicians using a 5/32 inch hex key or driver. Ensure the mating tapped hole is clean and thread-chased to 1/4-20 UNC before installation. De-energize and lock out any equipment before servicing assemblies containing shoulder screws. Do not exceed the rated shear and tensile load for Grade 8 alloy steel fasteners of this diameter.