Value Collection 221208BR Shoulder Screw 5/8 in Alloy Steel

Product Description

The VALUE COLLECTION 221208BR is an alloy steel shoulder screw designed for precision fastening applications that require an accurately controlled bearing surface. The shoulder measures 0.625 inches in diameter and 5.5 inches in length, providing a ground cylindrical shank that serves as a shaft, pivot, or guide pin within a mating component. The threaded portion is 1/2-13 UNC, and the hex socket drive accepts a 5/16-inch hex key for installation. Material grade 8 alloy steel delivers high tensile strength suitable for demanding mechanical assemblies. The uncoated finish leaves the fastener ready for use as-received or for secondary finishing if required by the application.

This shoulder screw is suited for use in machine design, tooling fixtures, jigs, linkage assemblies, and precision mechanical components where a hardened, close-tolerance pivot or guide surface is needed. It is typically installed by machinists, tool-and-die makers, and maintenance technicians working on industrial equipment, automation hardware, and mechanical assemblies. The 7/8-inch head diameter and 3/8-inch head height provide a low-profile bearing surface against the workpiece, keeping the fastener seated securely without excessive protrusion.

Key Features

• 0.625-inch shoulder diameter provides a precise bearing and pivot surface
• 5.5-inch shoulder length accommodates deep housings and extended guide applications
• 1/2-13 UNC thread for strong, standard engagement in threaded bores
• Grade 8 alloy steel construction for high tensile strength and durability
• 5/16-inch hex socket drive allows torque application in confined spaces
• Meets ANSI B18.3 and ASME/ANSI B18.3 and ASTM A574 standards

Compatibility

Designed as a standard ANSI B18.3 shoulder screw for use in any application requiring a 5/8-inch shoulder diameter, 5.5-inch shoulder length, and 1/2-13 UNC threaded end in a hex socket head configuration.

Installation Notes

Install using a 5/16-inch hex key or Allen driver; ensure the threaded bore is clean and properly sized for 1/2-13 UNC engagement before installation. Shut down and de-energize any equipment before servicing fasteners in live assemblies. Do not use impact drivers on socket head shoulder screws, as this can damage the hex socket or over-stress the shoulder. Verify shoulder fit in the mating bore for correct clearance before final assembly.