Value Collection MP72020 Hex Socket Cap Screw 4-40 Unc 50 Pack

Product Description

The VALUE COLLECTION MP72020 is a hex socket cap screw designed for precision fastening in mechanical assemblies, fixtures, and equipment. Sized at 4-40 UNC with a 3/8-inch length under head, this screw is fully threaded and features a 3/32-inch hex drive for use with a standard hex key or Allen wrench. The alloy steel construction delivers the tensile strength required for demanding applications, while the black oxide finish provides a measure of corrosion resistance and reduces light reflection on finished assemblies. These screws are sold in a pack of 50 and conform to ANSI B18.3, ANSI B18.8.2, ANSI B2.2, and MS16555 standards.

This fastener is suited for light mechanical, electrical, and instrumentation work where a low-profile cap screw with fine thread control is needed. The 4-40 UNC thread size is common in small-scale assemblies including panel mounting, electronic enclosures, jigs, and tooling fixtures. Machinists, electricians, and mechanical technicians working on precision equipment will find this screw appropriate for applications that require consistent torque in tight spaces. The compact drive size allows access in recessed or confined mounting locations.

Key Features

• 4-40 UNC thread size for fine-thread fastening in small assemblies
• 3/8-inch length under head, fully threaded for maximum thread engagement
• 3/32-inch hex socket drive compatible with standard Allen keys
• Alloy steel construction for high tensile strength
• Black oxide finish for mild corrosion resistance and low-glare appearance
• Meets ANSI B18.3, ANSI B18.8.2, ANSI B2.2, and MS16555 standards

Compatibility

Designed as a standard 4-40 UNC hex socket cap screw suitable for any application requiring this thread size and a 3/8-inch under-head length per ANSI B18.3 dimensional specifications.

Installation Notes

Install using a calibrated hex key or Allen wrench matched to the 3/32-inch drive size to avoid rounding the socket. Verify that the mating threaded hole or nut meets 4-40 UNC thread specifications before installation. Do not exceed the torque rating of the mating material, particularly when threading into aluminum, plastic, or soft alloys. Ensure the fastener is fully seated and threads are clean and free of debris before applying final torque.