Value Collection 711281PS Shoulder Screw 1/2 in 6-1/2 in 3/8-16

Product Description

The VALUE COLLECTION 711281PS is a hex socket shoulder screw machined from 4140 alloy steel for use in precision fastening and mechanical assembly applications. It features a 1/2-inch shoulder diameter and a 6-1/2-inch shoulder length, providing an extended bearing surface suited for pivot points, linkages, and guided-motion assemblies. The 3/8-16 UNC threaded shank engages standard tapped holes, while the 1/4-inch hex socket drive allows for installation with a standard hex key or Allen driver. The uncoated finish leaves the steel in its natural state for applications where coating buildup or dimensional tolerancing is a concern. Machinists, maintenance mechanics, and industrial assemblers install this type of fastener in both light and heavy-duty mechanical systems.

This shoulder screw is suited for use in jigs, fixtures, dies, and machine assemblies where a precision-ground cylindrical shank is required to serve as a shaft, guide pin, or pivot. The extended 6-1/2-inch shoulder length accommodates thicker workpieces or stacked components. The 3/8-16 UNC thread is a common size found in a wide range of industrial equipment and tooling. This part ships individually and is intended for professional mechanical or manufacturing environments requiring ANSI B18.3 and ASME/ANSI B18.3 compliant fasteners.

Key Features

• 1/2-inch shoulder diameter with 6-1/2-inch shoulder length for extended bearing surface
• 3/8-16 UNC threaded shank for engagement with standard tapped holes
• 4140 alloy steel construction for high tensile strength and wear resistance
• 1/4-inch hex socket drive compatible with standard Allen keys and hex drivers
• 3/4-inch head diameter and 5/16-inch head height per ANSI B18.3 dimensional standards
• Uncoated finish maintains precise shoulder dimensions without coating interference

Compatibility

Designed as an OEM-style replacement or direct-use fastener for industrial machinery, jigs, fixtures, and mechanical assemblies requiring a 1/2-inch diameter, 6-1/2-inch shoulder length, 3/8-16 UNC shoulder screw conforming to ANSI B18.3 and ASME/ANSI B18.3 standards.

Installation Notes

Installation is typically performed by machinists or mechanical assemblers using a 1/4-inch hex key or Allen driver. Ensure the mating tapped hole is clean and dimensionally correct for 3/8-16 UNC thread engagement before installing. Do not exceed the rated torque range for the thread size and material grade, and confirm the shoulder fits the bore diameter within specified tolerances to prevent binding or misalignment. Follow applicable ASME and ANSI fastener standards for proper installation procedure.