Value Collection 225049PR Shoulder Screw 3/8 in 5/16-18 Alloy Steel

Product Description

The VALUE COLLECTION 225049PR is a hex socket shoulder screw machined from 4140 alloy steel. It features a 3/8 inch shoulder diameter and a 3/8 inch shoulder length, making it a compact, precise fastener suited for applications that require a fixed bearing surface or a pivot point. The 5/16-18 UNC threaded end provides secure clamping, while the hex socket drive accepts a 3/16 inch hex key for installation in confined spaces. The 9/16 inch head diameter and 1/4 inch head height conform to ASME/ANSI B18.3, ASTM F835, and IFI 124 standards. Machinists, maintenance technicians, and mechanical assemblers install this type of fastener in fixtures, jigs, tooling, and precision machinery.

This shoulder screw is designed for use in industrial and commercial mechanical assemblies where a hardened, close-tolerance shoulder is needed to guide motion, locate components, or serve as a pivot or bearing surface. Typical applications include fixture plates, die sets, linkage assemblies, and any setup requiring a repeatable, low-friction interface between moving parts. The 4140 alloy steel construction provides the strength and wear resistance expected in demanding shop and production environments.

Key Features

• 3/8 inch shoulder diameter with 3/8 inch shoulder length for precise location and bearing service
• 5/16-18 UNC threaded end for positive clamping engagement
• Hex socket drive, 3/16 inch key size, for installation in tight or recessed areas
• 4140 alloy steel construction for high tensile strength and wear resistance
• 9/16 inch head diameter, 1/4 inch head height — dimensioned to ASME/ANSI B18.3
• Meets ASME/ANSI B18.3, ASTM F835, and IFI 124 standards

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket shoulder screw for use in industrial fixtures, jigs, tooling, and mechanical assemblies requiring a 3/8 inch shoulder diameter with a 5/16-18 UNC threaded end.

Installation Notes

Installation is typically performed by machinists or mechanical technicians using a 3/16 inch hex key or Allen driver. Ensure the mating bore is machined to the appropriate tolerance for the 3/8 inch shoulder before installation. De-energize or lock out any equipment before replacing or installing shoulder screws in live assemblies. Do not exceed the fastener rated load by using it as a structural substitute for a standard cap screw.