Value Collection -33643-4 Hex Socket Cap Screw 3/8-16 Unc

Product Description

The VALUE COLLECTION -33643-4 is a partially threaded hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and maintenance settings. It features a 3/8-16 UNC thread size, a 6-inch length under head, and a 5/16-inch hex drive. Constructed from alloy steel with a black oxide finish coating, this fastener delivers strong clamping force and moderate corrosion resistance. It is installed using a hex key or Allen wrench and is appropriate for machine assembly, structural clamping, and equipment repair tasks performed by maintenance technicians and tradespeople.

This screw is suited for general industrial fastening applications where a socket-drive cap screw with partial threading is required. The partial thread profile allows for greater thread engagement in thicker materials and provides a clamping zone along the unthreaded shank. It is commonly used in machine frames, brackets, fixtures, and fabricated assemblies across manufacturing and maintenance environments.

Key Features

• 3/8-16 UNC thread size for broad compatibility with standard tapped holes
• 6-inch length under head accommodates deep clamping and thick-stack assemblies
• Partially threaded shank provides a smooth clamping surface between fastened components
• 5/16-inch hex drive for precise torque application with a standard Allen key
• Alloy steel construction offers high tensile strength for demanding fastening applications
• Black oxide finish coating provides mild corrosion resistance and reduces light reflection
• Meets ASME/ANSI B18.3 and ASTM A574 fastener standards

Compatibility

Designed as a standard replacement or stock fastener for applications requiring a 3/8-16 UNC partially threaded hex socket cap screw conforming to ASME/ANSI B18.3 and ASTM A574 specifications.

Installation Notes

Installation is performed using a 5/16-inch hex key or Allen wrench. De-energize and lock out any equipment before fastener service to comply with applicable safety protocols. Ensure the receiving tapped hole is clean and free of debris before installation. Do not exceed the design torque range for 3/8-16 alloy steel fasteners as specified in the applicable ASME or ASTM standard.