Value Collection 581371PR Hex Socket Cap Screw 1/4-20 Unc

Product Description

The VALUE COLLECTION 581371PR is a hex socket cap screw designed for secure mechanical fastening in industrial, maintenance, and trade applications. Sized at 1/4-20 UNC with a 1-3/8 inch length under head, it is fully threaded and driven by a 3/16 inch hex key. Constructed from alloy steel with a black oxide finish, this fastener delivers solid tensile strength and corrosion resistance suitable for general-purpose and precision assemblies. Installation requires a standard hex key or Allen driver. The black oxide coating reduces surface friction and provides a degree of rust inhibition in dry or mildly corrosive environments.

This cap screw is suited for use in mechanical assemblies, equipment maintenance, and fabrication work across a broad range of industries. Its 1/4-20 UNC thread form is one of the most common unified coarse thread standards, making it compatible with a wide range of tapped holes, threaded inserts, and standard nuts in residential and commercial equipment. Electricians, HVAC technicians, plumbers, and general maintenance professionals routinely use fasteners in this class when reassembling panels, equipment enclosures, brackets, and mechanical supports. Full threading along the shank length provides consistent engagement from head to tip.

Key Features

• 1/4-20 UNC fully threaded shank for maximum thread engagement
• 1-3/8 inch length under head suits medium-depth fastening applications
• 3/16 inch hex drive for use with standard Allen or hex key sets
• Alloy steel construction meets ASME/ANSI B18.3 and ASTM A574 standards
• Black oxide finish provides mild corrosion resistance and reduced galling
• Meets ASME/ANSI B18.3 and ASTM A574 fastener standards

Compatibility

Designed as a standard 1/4-20 UNC hex socket cap screw for use in any application requiring a fastener conforming to ASME/ANSI B18.3 and ASTM A574 specifications.

Installation Notes

Installation is performed with a 3/16 inch hex key or Allen driver. Ensure the mating thread is clean and free of debris before driving the fastener. Do not over-torque alloy steel cap screws in soft or cast materials. When used in electrical enclosures or equipment panels, de-energize all circuits before beginning fastener work.