Value Collection 581427PR Hex Socket Cap Screw 5/16-18

Product Description

The VALUE COLLECTION 581427PR is a hex socket cap screw designed for applications requiring a recessed drive fastener with a clean, low-profile head. Threaded to 5/16-18 UNC with a 1-5/8 inch length under head, this screw is partially threaded and driven with a 1/4 inch hex key. It is manufactured from alloy steel with a black oxide finish for corrosion resistance and surface hardness. This fastener meets ASME/ANSI B18.3 and ASTM A574 standards, making it suitable for demanding mechanical and structural assemblies. It is commonly installed by machinists, millwrights, pipefitters, and general mechanical contractors.

This socket cap screw is used in a wide range of industrial, mechanical, and trade applications where a standard hex head would interfere with surrounding components or clearance is limited. The partially threaded shank provides a grip zone for precise clamping force in bolted joints. Typical install scenarios include machine frames, bracket mounting, fixture assembly, and equipment maintenance across light industrial and heavy commercial environments.

Key Features

• 5/16-18 UNC thread size for compatibility with standard inch-series tapped holes
• 1-5/8 inch length under head with partial threading for reliable clamping
• 1/4 inch hex socket drive for use with standard hex keys or socket bits
• Alloy steel construction meets ASTM A574 mechanical property requirements
• Black oxide finish provides mild corrosion resistance and reduces light reflection
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as an OEM-style replacement or stock fastener for any 5/16-18 UNC tapped hole application requiring a socket cap screw per ASME/ANSI B18.3 dimensional standards.

Installation Notes

Installation requires a 1/4 inch hex key or socket drive bit. Always verify the mating tapped hole is clean, properly formed, and free of debris before installation. Do not exceed the rated torque for the thread size and material class. Follow applicable industry standards and equipment manufacturer guidelines when torquing fasteners in structural or pressure-bearing assemblies.