Value Collection 225112PR Shoulder Screw 1/2 in 1-1/4 in 3/8-16

Product Description

The VALUE COLLECTION 225112PR is a hex socket shoulder screw machined from 4140 alloy steel, designed for precision alignment and pivot applications in mechanical assemblies. The shoulder measures 0.5 inches in diameter and 1-1/4 inches in length, providing a hardened, ground bearing surface that controls spacing and allows rotational movement of mating components. The threaded portion is 3/8-16 UNC. Drive is a 1/4 inch hex socket, requiring an Allen wrench or hex bit for installation. This fastener meets ASME/ANSI B18.3, ASTM F835, and IFI 124 standards, making it suitable for demanding industrial and mechanical service environments.

Shoulder screws of this type are commonly used in jigs, fixtures, dies, linkages, and pivot assemblies across manufacturing, maintenance, and industrial construction settings. The 1/2 inch shoulder diameter suits medium-duty alignment tasks where a precise bearing surface is needed. Machinists, millwrights, and maintenance technicians typically specify this size for applications involving guided motion, retained bearings, or controlled pivot points in fabricated assemblies.

Key Features

• 0.5 inch shoulder diameter and 1-1/4 inch shoulder length for precise alignment and spacing
• 4140 alloy steel construction for high tensile strength and wear resistance
• 3/8-16 UNC thread for secure clamping into threaded bores
• 1/4 inch hex socket drive compatible with standard Allen keys and hex bit drivers
• 3/4 inch head diameter and 5/16 inch head height provide a low-profile seating surface
• Meets ASME/ANSI B18.3, ASTM F835, and IFI 124 standards

Compatibility

Designed as a standard shoulder screw for use in mechanical assemblies, jigs, fixtures, and pivot applications requiring a 1/2 inch shoulder diameter and 3/8-16 UNC threaded engagement.

Installation Notes

Installation is performed by machinists, millwrights, or maintenance technicians using a 1/4 inch hex key or hex socket driver. De-energize and lock out all equipment before servicing any assembly containing this fastener. Thread engagement should be verified against the mating bore depth to ensure the shoulder seats fully against the workpiece surface. Do not over-torque; refer to applicable ASME standards for torque guidance appropriate to the thread size and material.