Value Collection 221244BR Shoulder Screw 3/4 in Alloy Steel

Product Description

The VALUE COLLECTION 221244BR is an alloy steel shoulder screw designed for precision fastening applications where a hardened, close-tolerance cylindrical shoulder is required. The shoulder measures 0.75 inches in diameter and 4 inches in length, providing a smooth bearing surface for bushings, rollers, and pivoting components. The 5/8-11 UNC threaded section secures the fastener into a tapped hole, while the hex socket drive accepts a 3/8-inch drive tool for installation. Grade 8 alloy steel construction meets ANSI B18.3, ASME/ANSI B18.3, and ASTM A574 standards. Machinists, millwrights, and maintenance technicians working on jigs, fixtures, and mechanical assemblies are the typical end users.

This shoulder screw suits industrial and commercial applications where a fixed or rotating shaft surface is needed between two components. Common uses include linkage pivots, guide pins, and bearing shaft applications in machinery, tooling fixtures, and mechanical assemblies. The uncoated finish indicates a bare alloy steel surface suitable for environments where additional plating or coating will be applied by the installer, or where an uncoated surface is otherwise acceptable for the application.

Key Features

• Grade 8 alloy steel construction meets ANSI B18.3, ASME/ANSI B18.3, and ASTM A574 standards
• 0.75-inch shoulder diameter with a 4-inch shoulder length for extended bearing surface
• 5/8-11 UNC thread for secure engagement in standard tapped holes
• 3/8-inch hex socket drive for precise torque application with standard socket tooling
• 1-inch head diameter and 0.5-inch head height provide a low-profile clamping surface
• Uncoated finish — compatible with post-installation coatings or bare-steel applications

Compatibility

Designed as a standard shoulder screw for use in jigs, fixtures, tooling, and mechanical assemblies requiring a 3/4-inch diameter, 4-inch length hardened shoulder with a 5/8-11 UNC threaded end.

Installation Notes

Installation is typically performed by machinists, millwrights, or maintenance technicians using a 3/8-inch hex key or socket driver. Ensure the mating tapped hole is clean and the thread engagement depth is sufficient for the application load before driving the fastener. Do not use an impact driver at full torque without verifying thread condition, as this can strip the socket or damage the threaded bore. Grade 8 alloy steel fasteners should be handled and stored to avoid corrosion, particularly in uncoated form.