Value Collection 581441PR Hex Socket Cap Screw 5/16-18

Product Description

The VALUE COLLECTION 581441PR is a hex socket cap screw designed for high-strength fastening applications where a low-profile head and internal hex drive are required. Sized at 5/16-18 UNC thread with an 8-inch length under head, this fastener is partially threaded and manufactured from alloy steel with a black oxide finish. The black oxide coating provides mild corrosion resistance and reduces light reflection on exposed hardware. This screw is installed with a 1/4-inch hex key or Allen driver and meets ASME/ANSI B18.3 and ASTM A574 standards, making it suitable for demanding mechanical and structural assemblies.

This fastener is used across a wide range of trade and industrial applications including HVAC equipment assembly, plumbing fixture mounting, electrical enclosure fabrication, and general mechanical maintenance. The 5/16-18 UNC coarse thread pattern is a standard size compatible with common tapped holes in steel, aluminum, and other metal components. The 8-inch length under head makes it appropriate for through-bolting thicker assemblies or stacked components where shorter fasteners would not reach.

Key Features

• 5/16-18 UNC coarse thread for broad compatibility with standard tapped holes
• 8-inch length under head accommodates thick or stacked assemblies
• Partially threaded shank provides shear strength in load-bearing joints
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide finish offers mild corrosion resistance and a low-glare appearance
• 1/4-inch hex drive accepts standard Allen keys and hex bit drivers

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw for use in any application requiring a 5/16-18 UNC threaded fastener with an 8-inch length under head.

Installation Notes

Installation is performed with a 1/4-inch hex key or hex bit rated for the torque requirements of the application. Always verify thread engagement depth and confirm the receiving material is tapped to the correct UNC specification before driving. Follow applicable mechanical codes and equipment manufacturer torque guidelines for the assembly type. Do not use impact drivers without a torque-limiting attachment, as over-torquing alloy socket cap screws can result in head damage or fastener failure.