Value Collection 221229BR Shoulder Screw 3/4 in Alloy Steel

Product Description

The VALUE COLLECTION 221229BR is an alloy steel shoulder screw designed for precision fastening applications where a smooth, hardened bearing surface is required. The shoulder measures 0.75 inches in diameter and 2.75 inches in length, providing a precise pivot or locating surface for bushings, links, and rotating components. The 5/8-11 UNC threaded section secures the fastener in place while the shoulder handles radial loads. Manufactured to material grade 8 and conforming to ANSI B18.3 and ASTM A574 standards, this screw delivers the strength and dimensional accuracy that precision assemblies demand. A 3/8 inch hex socket drive allows for controlled installation with standard hex keys or Allen drivers.

This shoulder screw is suited for use in mechanical assemblies, jigs and fixtures, machine linkages, die sets, and similar applications where a controlled-diameter shank acts as a shaft, pivot, or guide pin. It is appropriate for both light industrial and maintenance environments. The uncoated alloy steel construction makes it compatible with applications where plating or coating would affect dimensional tolerance. Machinists, tool and die technicians, and maintenance mechanics commonly specify this type of fastener when building or servicing mechanical assemblies that require repeatable alignment.

Key Features

• Shoulder diameter of 0.75 inches and shoulder length of 2.75 inches for precise fitment in bored or bushed holes
• 5/8-11 UNC thread for secure anchoring into tapped holes
• Material grade 8 alloy steel for high tensile strength and wear resistance
• 3/8 inch hex socket drive for installation with Allen keys or hex bit drivers
• Uncoated finish maintains tight dimensional tolerances critical to precision applications
• Meets ANSI B18.3, ASME/ANSI B18.3, and ASTM A574 standards

Compatibility

Designed as a standard shoulder screw for use in mechanical assemblies, fixtures, and machine components that require a 0.75 inch diameter shoulder with a 5/8-11 UNC threaded end. Verify tapped hole thread engagement depth and clearance bore diameter before installation.

Installation Notes

Installation is typically performed by machinists or maintenance mechanics using a 3/8 inch hex key or socket driver. Ensure the mating tapped hole meets the 5/8-11 UNC thread specification and that the clearance bore is machined to the appropriate tolerance for the 0.75 inch shoulder diameter. Do not overtighten, as the shoulder length controls axial positioning and excessive torque can damage the seating surface. Follow applicable ASME fastener standards for thread engagement minimums.