Value Collection 221256BR Shoulder Screw 3/4 in Alloy Steel

Product Description

The VALUE COLLECTION 221256BR is a Grade 8 alloy steel shoulder screw designed for precision fastening applications where a tight-tolerance cylindrical shoulder is required. The screw features a 3/4-inch shoulder diameter and a 5-inch shoulder length, providing a smooth, hardened bearing surface for rotating or sliding components. Drive engagement is via a 3/8-inch hex socket. The uncoated finish is standard for this grade. Licensed trades and industrial maintenance professionals install this fastener in mechanical assemblies, jigs, fixtures, and pivot applications where load-bearing accuracy matters.

This shoulder screw is suited for use in manufacturing equipment, tooling fixtures, conveyor assemblies, and mechanical linkages that require a precision shoulder as a shaft, pivot pin, or guide. The 5/8-11 UNC threaded end secures into tapped holes in steel or similarly rated material. The 1-inch head diameter and 1/2-inch head height provide adequate bearing surface at the fastener head. Single-piece packaging makes it practical as an individual replacement or repair fastener.

Key Features

• Grade 8 alloy steel construction for high tensile strength and shear resistance
• 3/4-inch shoulder diameter with 5-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 compatible with standard Allen wrenches and hex-bit drivers
• Uncoated finish — suitable for use as-is or with applied lubricant or coating
• Meets ANSI B18.3, ASME/ANSI B18.3, and ASTM A574 standards

Compatibility

Designed as an OEM-style replacement or general-use shoulder screw for mechanical assemblies requiring a 3/4-inch diameter, 5-inch shoulder length, Grade 8 alloy steel fastener with a 5/8-11 UNC thread and hex socket drive.

Installation Notes

Installation is performed by machinists, millwrights, or qualified maintenance technicians using a 3/8-inch hex key or socket driver. Ensure the mating tapped hole is clean, undamaged, and sized for 5/8-11 UNC thread before installation. De-energize and lock out any machinery before servicing fasteners in moving assemblies. Do not exceed the torque rating of the mating material — consult engineering specifications for the specific assembly.