Value Collection 225238BR Shoulder Screw 3/4 in 4140 Alloy Steel

Product Description

The VALUE COLLECTION 225238BR is a hex socket shoulder screw machined from 4140 alloy steel, designed for precision alignment, pivoting, and linkage applications in mechanical assemblies. The shoulder measures 0.75 inches in diameter and 3.5 inches in length, providing a smooth, accurate bearing surface. The threaded end is 5/8-11 UNC, and the hex socket drive accepts a 3/8 inch driver. A 0.5 inch head height and 1.0 inch head diameter complete the profile. This fastener meets ASME/ANSI B18.3, ASTM F835, and IFI 124 standards. Machinists, maintenance technicians, and industrial assemblers install this type of screw where a close-tolerance unthreaded shank is required to locate or guide a component.

This shoulder screw is suited for use in jigs, fixtures, dies, and general industrial machinery where a hardened, dimensionally consistent bearing surface is needed. The 4140 alloy steel construction provides high tensile strength and wear resistance, making it appropriate for moderate-to-heavy-duty mechanical linkages, cam followers, and pivot points in both OEM manufacturing and MRO replacement contexts.

Key Features

• Shoulder diameter of 0.75 inches provides a precision bearing and alignment surface
• Shoulder length of 3.5 inches accommodates thick assemblies and stacked components
• 5/8-11 UNC threaded end for secure fastening into tapped bores
• 3/8 inch hex socket drive for torque application with standard Allen or hex bit tools
• 4140 alloy steel construction for high tensile strength and wear resistance
• Meets ASME/ANSI B18.3, ASTM F835, and IFI 124 dimensional and material standards

Compatibility

Designed as a standard shoulder screw for use in jigs, fixtures, dies, and mechanical assemblies requiring a 0.75 inch shoulder diameter and 5/8-11 UNC thread per ASME/ANSI B18.3 specifications.

Installation Notes

Installation is performed by machinists or maintenance technicians using a 3/8 inch hex key or socket bit driver. Ensure the tapped receiving bore is clean and dimensioned to the 5/8-11 UNC thread specification before installation. Do not apply torque to the shoulder; drive force is applied only to the hex socket in the head. Consult applicable machinery safety procedures and lock out or tag out the equipment before servicing any assembly containing this fastener.