Value Collection 221175BR Shoulder Screw 5/8in Alloy Steel

Product Description

The VALUE COLLECTION 221175BR is a Grade 8 alloy steel shoulder screw designed for precision-location and pivot applications in mechanical assemblies. The shoulder measures 0.625 inches in diameter and 2.5 inches in length, providing an accurate bearing surface for bushings, linkages, and rotating components. The 1/2-13 UNC threaded section secures the fastener in tapped holes, while the 7/8-inch-diameter hex-socket head accepts a 5/16-inch hex key for installation. Left uncoated, this screw is suited for applications where surface treatment will be applied after assembly or where bare steel is acceptable.

This shoulder screw is used in industrial machinery, jigs, fixtures, and mechanical linkages where a precision-ground cylindrical shoulder is needed to locate or guide a mating component. It is appropriate for both light-production and maintenance-and-repair environments. Installers include machinists, millwrights, and mechanical technicians working on equipment requiring controlled-clearance pivot points or linear guide elements.

Key Features

• 0.625-inch shoulder diameter provides a precise bearing surface for bushings and rotating parts
• 2.5-inch shoulder length accommodates thicker assemblies and stacked components
• Grade 8 alloy steel construction for high tensile and shear strength
• 1/2-13 UNC thread for secure engagement in standard tapped holes
• 5/16-inch hex socket drive allows torquing in tight clearances
• Uncoated finish — compatible with post-assembly plating or coating processes
• Meets ANSI B18.3 and ASTM A574 standards for dimensional and mechanical compliance

Compatibility

Designed as a standard shoulder screw per ANSI B18.3 and ASME/ANSI B18.3, suitable for use in any tapped 1/2-13 UNC hole application requiring a 0.625-inch shoulder diameter.

Installation Notes

Installation is performed by machinists or mechanical technicians using a 5/16-inch hex key or Allen driver. Ensure the mating tapped hole is clean and threads are in good condition before driving the screw. Do not exceed recommended seating torque for the thread size and material grade. Verify shoulder clearance fit with the mating bushing or bore before final assembly.