Value Collection 225097PR Shoulder Screw 3/8x4 in 4140 Steel

Product Description

The VALUE COLLECTION 225097PR is a hex socket shoulder screw machined from 4140 alloy steel, designed for precision-fit applications where a hardened, accurately dimensioned shoulder is required as a pivot, guide, or dowel pin substitute. The shoulder measures 0.375 inches in diameter and 4 inches in length, providing a long, smooth bearing surface. The drive is a 3/16-inch hex socket, and the threaded end is 5/16-18 UNC. The head diameter is 0.5625 inches with a head height of 0.25 inches. This fastener is manufactured to ASME/ANSI B18.3, ASTM F835, and IFI 124 standards.

Shoulder screws of this configuration are commonly used in machine assemblies, jigs and fixtures, die sets, linkage mechanisms, and industrial equipment where a precision-diameter shank must rotate or slide within a mating bore. The 4-inch shoulder length suits applications requiring extended linear travel or deeper through-hole engagement. These fasteners are installed by machinists, millwrights, tool and die makers, and maintenance mechanics working on mechanical assemblies across manufacturing and industrial settings.

Key Features

• 4140 alloy steel construction for high tensile strength and wear resistance
• 0.375-inch shoulder diameter with 4-inch shoulder length for extended bearing surface
• 3/16-inch hex socket drive for installation with a standard hex key or Allen driver
• 5/16-18 UNC threaded end for reliable clamping engagement
• Meets ASME/ANSI B18.3, ASTM F835, and IFI 124 standards
• 0.5625-inch head diameter and 0.25-inch head height for low-profile seating

Compatibility

Designed as a standard shoulder screw replacement or original-installation fastener for mechanical assemblies requiring a 3/8-inch shoulder diameter, 4-inch shoulder length, and 5/16-18 UNC thread engagement.

Installation Notes

Installation requires a 3/16-inch hex key or Allen driver. Ensure the mating bore diameter matches the shoulder diameter closely for proper fit and function. Torque the threaded end into the tapped hole until the shoulder seats flush against the workpiece surface. Power down and de-energize any equipment before fastener service or replacement.