Value Collection 581385PR Hex Socket Cap Screw 1/4-20

Product Description

The VALUE COLLECTION 581385PR is a hex socket cap screw designed for secure fastening in applications requiring a recessed drive and high tensile strength. The screw features a 1/4-20 UNC thread size and a 5-1/2 inch length under head, with partial threading along the shank. The 3/16 inch hex drive allows for precise torque application using a standard hex key or Allen wrench. Manufactured from alloy steel with a black oxide coating, this screw delivers corrosion resistance and a clean, uniform finish. It meets ASME/ANSI B18.3 and ASTM A574 standards, making it appropriate for structural and mechanical fastening work.

This screw is suited for machine assembly, tooling, fixture building, and general mechanical fastening in industrial and commercial settings. Its partially threaded shank provides a smooth shoulder section useful where shear strength and precise alignment between mated parts are needed. Machinists, maintenance technicians, and mechanical contractors are the primary installers. The 1/4-20 UNC thread pattern is one of the most common unified coarse thread specifications, making it compatible with a wide range of standard tapped holes.

Key Features

• 1/4-20 UNC thread for broad compatibility with standard tapped holes
• 5-1/2 inch length under head with partial threading for shear-resistant shoulder section
• Alloy steel construction meets ASTM A574 high-strength fastener specification
• Black oxide coating provides mild corrosion resistance and reduces surface glare
• 3/16 inch hex socket drive for precise torque application with standard hex keys
• Conforms to ASME/ANSI B18.3 dimensional standard

Compatibility

Designed as a standard 1/4-20 UNC hex socket cap screw for use in any application requiring a conforming ASME/ANSI B18.3 fastener in a matching tapped or threaded hole.

Installation Notes

Installation is performed with a 3/16 inch hex key or T-handle driver. Ensure the mating tapped hole is clean and free of debris before driving the screw. Follow applicable torque guidelines from the engineering specification or fastener manufacturer for the alloy steel grade. Do not exceed the rated torque for the thread size, as over-torquing can strip the thread or cause fastener failure.