Value Collection A997113 Shoulder Screw 5/16 in 4140 Steel

Product Description

The VALUE COLLECTION A997113 is a shoulder screw designed for precision fastening applications where a hardened, close-tolerance bearing surface is required. The shoulder measures 0.312 inches in diameter and 3 inches in length, providing a consistent pivot or locating surface for bushings, links, and mating components. The 1/4-20 UNC threaded section engages a tapped hole to draw the assembly tight against the shoulder. Manufactured from 4140 alloy steel with an uncoated finish, this screw is suited for mechanical assemblies, jigs, fixtures, and tooling. Installation requires a 5/32-inch hex socket driver.

This shoulder screw is commonly used in industrial machinery, manufacturing fixtures, linkage assemblies, and precision tooling where a smooth, hardened shoulder acts as a bearing or pivot surface. The 3-inch shoulder length accommodates deeper stacks of components such as bushings, cam followers, or sprung elements. The uncoated 4140 alloy steel construction is appropriate for dry or lightly lubricated environments. Sold in a package quantity of five, this fastener is suited for maintenance shops, machine builders, and production applications requiring multiple identical fasteners. Licensed trades and machining professionals are the typical end users.

Key Features

• 0.312-inch shoulder diameter provides a close-tolerance bearing surface for bushings and pivots
• 3-inch shoulder length accommodates deep component stacks in fixture and linkage applications
• 1/4-20 UNC thread for secure clamping engagement in tapped holes
• 4140 alloy steel construction for high strength and wear resistance
• 5/32-inch hex socket drive for precise torque application in tight spaces
• Meets ANSI B18.3, ASME/ANSI B18.3, and ASTM A574 standards

Compatibility

Designed as an OEM-style replacement or standard-stock shoulder screw for applications requiring a 5/16-inch diameter, 3-inch shoulder length fastener with a 1/4-20 UNC thread and hex socket drive.

Installation Notes

Installation is performed by machinists, maintenance technicians, or mechanical assemblers using a 5/32-inch hex key or hex socket driver. Ensure the mating tapped hole is clean and correctly sized for a 1/4-20 UNC thread before installation. Do not exceed the rated thread engagement depth, and avoid over-torquing, which can damage the thread or distort the shoulder. Verify shoulder-to-bore clearance matches the application requirement before final assembly.