Value Collection 711070PR Shoulder Screw 3/8 in 5/16-18 Alloy Steel

Product Description

The VALUE COLLECTION 711070PR is a hex socket shoulder screw machined from 4140 alloy steel in an uncoated finish. The shoulder measures 3/8 inch in diameter and 5/16 inch in length, providing a precise bearing surface for rotating or sliding components. The threaded portion is 5/16-18 UNC. The head stands 1/4 inch tall with a 9/16 inch diameter and accepts a 3/16 inch hex key. This fastener is used in fixtures, jigs, and mechanical assemblies where a hardened, close-tolerance pivot or guide pin is required. Installation is handled by maintenance technicians, tool-and-die makers, and mechanical assembly professionals.

Shoulder screws of this type are commonly installed in manufacturing fixtures, die sets, punch press tooling, robotic end effectors, and general mechanical assemblies requiring a precise shoulder to locate or pivot a mating component. The 4140 alloy steel construction provides the hardness and shear strength needed in cyclic-load and high-wear applications. The uncoated finish is suitable for environments where a secondary coating or lubrication will be applied by the end user.

Key Features

• 3/8 inch shoulder diameter with 5/16 inch shoulder length for precise component location
• 5/16-18 UNC thread for broad compatibility with standard tapped holes
• 4140 alloy steel construction for high tensile strength and wear resistance
• 3/16 inch hex socket drive for installation with standard hex keys or Allen wrenches
• 9/16 inch head diameter and 1/4 inch head height provide positive clamping surface
• Meets ANSI B18.3, ASME/ANSI B18.3, and ASTM A574 standards

Compatibility

Designed as a standard shoulder screw for mechanical assemblies, fixtures, and tooling applications requiring a 3/8 inch shoulder diameter and 5/16-18 UNC thread.

Installation Notes

Install using a 3/16 inch hex key or T-handle driver; do not use an impact driver, as this can damage the socket or overtorque the thread. Ensure the mating tapped hole is clean and properly sized for 5/16-18 UNC before installation. De-energize and lock out any machinery before replacing shoulder screws in live equipment. Verify shoulder fit in the mating bore before final assembly to confirm proper clearance or press-fit condition.