Value Collection 225064PR Shoulder Screw 3/8 in 4140 Alloy Steel

Product Description

The VALUE COLLECTION 225064PR is a hex socket shoulder screw machined from 4140 alloy steel, designed for precision fastening applications where a smooth, cylindrical shoulder serves as a bearing surface, pivot point, or locating pin. The shoulder measures 3/8 inch in diameter and 1-1/4 inches in length, with a 5/16-18 UNC threaded end for secure engagement. The recessed hex socket drive accepts a 3/16 inch hex key. This fastener meets ASME/ANSI B18.3, ASTM F835, and IFI 124 standards, making it suitable for demanding mechanical and industrial assembly work.

Shoulder screws of this type are used across a wide range of applications including machine tooling fixtures, die sets, linkage assemblies, and precision mechanical components where a controlled-clearance journal or pivot is required. The 3/8 inch shoulder diameter and 1-1/4 inch shoulder length suit mid-range load and travel requirements in both production and maintenance contexts. Typically installed by machinists, tool and die makers, and maintenance technicians working on mechanical assemblies requiring precise alignment or articulation.

Key Features

• 3/8 inch shoulder diameter with 1-1/4 inch shoulder length for accurate locating and pivot applications
• 4140 alloy steel construction provides high tensile strength and wear resistance
• 5/16-18 UNC threaded end for standard inch-series tapped hole engagement
• 3/16 inch hex socket drive for precise torque application in confined spaces
• 9/16 inch head diameter and 1/4 inch head height for low-profile seating
• Meets ASME/ANSI B18.3, ASTM F835, and IFI 124 standards

Compatibility

Designed as a standard inch-series shoulder screw for use in any application requiring a 3/8 inch shoulder diameter, 1-1/4 inch shoulder length, and a 5/16-18 UNC threaded end in a hex socket head configuration.

Installation Notes

Install using a 3/16 inch hex key or appropriate hex socket driver. Ensure the mating tapped hole is clean and to 5/16-18 UNC specification before installation. Do not over-torque; the shoulder, not the thread, carries the primary load. Verify shoulder fit and clearance in the bore prior to final assembly.