Value Collection 221115PR Shoulder Screw 1/2 in Alloy Steel

Product Description

The VALUE COLLECTION 221115PR is a Grade 8 alloy steel shoulder screw designed for precision fastening applications where a smooth, hardened cylindrical shoulder is required between fastened components. The shoulder measures 1/2 inch in diameter and 1-1/2 inches in length, providing a controlled bearing or pivot surface. The threaded portion uses a 3/8-16 UNC thread form. Drive engagement is via a 1/4 inch hex socket, allowing installation with a standard hex key or Allen driver. The uncoated finish is standard for this grade. This fastener is installed by machinists, maintenance technicians, and assembly professionals in industrial and mechanical applications.

Shoulder screws of this type are commonly used in jigs, fixtures, die sets, linkages, and pivot assemblies where a precise shaft diameter is needed to locate or guide a mating component. The 1/2 inch shoulder acts as the functional bearing surface, while the 3/8-16 UNC threaded end anchors the screw into a tapped hole. This part is sold in a minimum order quantity of 5 units, with individual package quantity of 1. Suitable for shop floor, toolroom, and manufacturing environments requiring ANSI and ASME-compliant fasteners.

Key Features

• 1/2 inch shoulder diameter provides a precise, hardened bearing or pivot surface
• 1-1/2 inch shoulder length accommodates standard fixture and die plate thicknesses
• Grade 8 alloy steel construction for high tensile strength and durability
• 3/8-16 UNC threaded end for secure engagement in standard tapped holes
• 1/4 inch hex socket drive for installation with a hex key or Allen driver
• Meets ANSI B18.3, ASME/ANSI B18.3, and ASTM A574 standards

Compatibility

Designed as a standard shoulder screw conforming to ANSI B18.3 and ASME/ANSI B18.3 specifications, suitable for use in any application requiring a 1/2 inch diameter shoulder, 1-1/2 inch shoulder length, and 3/8-16 UNC threaded engagement.

Installation Notes

Installation is performed using a 1/4 inch hex key or appropriate Allen driver. Ensure the mating tapped hole is clean and correctly sized for 3/8-16 UNC thread engagement before installation. Do not use an impact driver, as this can damage the hex socket recess or over-torque the fastener. Follow applicable facility or equipment manufacturer torque guidelines for Grade 8 alloy steel fasteners of this thread size.