Value Collection 221064P Shoulder Screw 3/8 in Alloy Steel

Product Description

The VALUE COLLECTION 221064P is an alloy steel shoulder screw designed for precision fastening applications where a smooth, controlled bearing surface is required. The shoulder measures 0.375 inches in diameter and 1-1/4 inches in length, providing a precise pivot or spacer surface between mated components. A 5/16-18 UNC threaded end secures the fastener in place. Drive engagement is via a 3/16 inch hex socket. Material grade 8 alloy steel provides high tensile strength suitable for demanding mechanical assemblies. The uncoated finish leaves the steel in its natural state. Machinists, toolmakers, and mechanical assembly technicians are the typical installers of this fastener.

This shoulder screw is suited for use in jigs, fixtures, linkages, and pivot assemblies across industrial and mechanical applications. The cylindrical shoulder allows mating components to rotate or slide freely around the screw body while the threaded portion locks into the tapped hole beneath. It is commonly found in machine tooling, automation fixtures, and precision mechanical devices where controlled motion or accurate spacing between parts is critical.

Key Features

• 0.375 inch shoulder diameter for precise fitment in close-tolerance bores
• 1-1/4 inch shoulder length provides a controlled bearing surface
• 5/16-18 UNC thread for secure engagement in standard tapped holes
• 3/16 inch hex socket drive for installation with standard Allen keys or hex bit drivers
• Grade 8 alloy steel construction for high tensile strength and durability
• Uncoated finish; meets ANSI B18.3, ASME/ANSI B18.3, and ASTM A574 standards

Compatibility

Designed as a standard shoulder screw for use in any application requiring a 0.375 inch shoulder diameter, 1-1/4 inch shoulder length, and 5/16-18 UNC threaded end in a grade 8 alloy steel hex socket fastener.

Installation Notes

Install using a 3/16 inch hex key or hex socket bit driver. Ensure the mating tapped hole is clean and free of debris before threading in the fastener. Power down or de-energize any equipment before performing fastener service on live assemblies. Do not exceed the rated torque capacity for the thread size and material grade; refer to standard UNC torque tables for 5/16-18 grade 8 fasteners.