Value Collection 225115PR Shoulder Screw 1/2 in 3/8-16 Alloy Steel

Product Description

The VALUE COLLECTION 225115PR is a hex socket shoulder screw machined from 4140 alloy steel for use in precision mechanical assemblies, jigs, fixtures, and pivot applications. The shoulder measures 0.500 inches in diameter and 1-1/2 inches in length, providing a smooth, accurate bearing surface. The threaded portion is 3/8-16 UNC. Drive engagement is via a 1/4 inch hex socket. Head diameter is 0.750 inches and head height is 0.313 inches. This fastener meets ASME/ANSI B18.3, ASTM F835, and IFI 124 standards, making it suitable for applications where dimensional accuracy and material strength are required.

Shoulder screws of this type are commonly used in tooling, machine guarding, linkage assemblies, and anywhere a captured pivot or guide pin is needed. The 4140 alloy steel construction provides high tensile strength and wear resistance for demanding industrial and mechanical service environments. This screw is appropriate for use by machinists, maintenance technicians, and mechanical assemblers working with metal fabrication equipment, automation components, or fixture plates.

Key Features

• Shoulder diameter of 0.500 inches provides a precise bearing or pivot surface
• Shoulder length of 1-1/2 inches suits moderate-depth fixture and linkage applications
• 4140 alloy steel construction for high tensile strength and wear resistance
• 3/8-16 UNC thread standard for broad hardware compatibility
• 1/4 inch hex socket drive for torque application with standard Allen keys or hex bits
• Meets ASME/ANSI B18.3, ASTM F835, and IFI 124 dimensional and material standards

Compatibility

Designed as an OEM-style replacement or direct-use shoulder screw for tooling plates, jigs, fixtures, and mechanical linkage assemblies requiring a 1/2 inch shoulder diameter and 3/8-16 UNC thread.

Installation Notes

Installation is performed by machinists or mechanical technicians using a 1/4 inch hex key or socket driver. The mating hole for the shoulder should be reamed or drilled to a close tolerance fit to the 0.500 inch shoulder diameter to achieve proper bearing function. De-energize and lock out any machinery before servicing fasteners in live assemblies. Do not substitute thread lubricants or adhesives without verifying compatibility with the assembly design.