Value Collection MP72120 Hex Socket Cap Screw 5/16-18 Unc 50pk

Product Description

The Value Collection MP72120 is a hex socket cap screw designed for secure mechanical fastening in high-strength applications. Featuring a 5/16-18 UNC thread size and a fully threaded shank measuring 1/2 inch under the head, this fastener is driven with a 1/4-inch hex key. Constructed from alloy steel with a black oxide finish coating, it delivers solid corrosion resistance and reduced light reflection in service environments. Manufactured to ASME B18.3 and ASTM A574 standards, this screw meets the dimensional and mechanical requirements expected in professional trade and industrial assembly work. Each package contains 50 screws.

This screw is suited for use in mechanical assemblies, equipment maintenance, structural fastening, and fabrication applications where a recessed hex drive and high tensile alloy steel construction are required. The black oxide coating makes it a common choice in applications where surface appearance and moderate corrosion protection are priorities. Electricians, millwrights, HVAC technicians, and general maintenance professionals regularly use this fastener type when assembling equipment panels, mounting brackets, and mechanical components.

Key Features

• 5/16-18 UNC fully threaded shank for consistent thread engagement
• 1/2-inch length under head for standard-depth fastening applications
• 1/4-inch hex drive for use with standard hex keys and bit sockets
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide finish provides moderate corrosion resistance and low reflectivity
• Conforms to ASME B18.3 dimensional standards

Compatibility

Designed as a standard ASME B18.3 hex socket cap screw suitable for use in any application requiring a 5/16-18 UNC threaded fastener with a 1/4-inch internal hex drive.

Installation Notes

Install using a properly sized 1/4-inch hex key or socket bit to avoid rounding the drive recess. De-energize or lock out any equipment before replacing or installing fasteners on live assemblies per applicable OSHA lockout/tagout procedures. Do not over-torque alloy socket cap screws without referencing the appropriate fastener torque table for the thread size and grade. Inspect threads on both the screw and the receiving component before installation to ensure clean engagement.