Value Collection MP72180 Hex Socket Cap Screw 3/8-16 Unc

Product Description

The VALUE COLLECTION MP72180 is a partially threaded hex socket cap screw engineered for demanding fastening applications in industrial, mechanical, and structural assemblies. It carries a 3/8-16 UNC thread and measures 4 inches in length under the head. Drive engagement is via a 5/16-inch hex socket. The base material is alloy steel finished with a black oxide coating, which provides moderate corrosion resistance and reduces surface reflectivity. This screw is manufactured to ANSI B18.3, ANSI B18.8.2, ANSI B2.2, and MS16555 standards. Sold in a package of five, it suits maintenance shops, OEM assembly lines, and field service technicians who keep common fastener sizes on hand.

This cap screw is used wherever a recessed hex drive is preferred over an external hex head — common in machine guards, fixture plates, tooling assemblies, motor mounts, and close-clearance mechanical enclosures. The partial threading design concentrates clamping load at the bearing surfaces and is appropriate for through-bolt applications where the shank spans multiple material layers. The black oxide finish makes it a standard choice in industrial and light-duty structural contexts where appearance and mild corrosion protection are both considerations.

Key Features

• 3/8-16 UNC thread for broad compatibility with standard inch-series tapped holes
• 4-inch length under head accommodates thicker stack-ups and multi-layer assemblies
• Partially threaded shank provides accurate shank-fit alignment and stronger clamp load
• 5/16-inch hex socket drive reduces cam-out risk and allows high torque input in confined spaces
• Alloy steel construction delivers higher tensile strength than standard steel fasteners
• Black oxide finish offers mild corrosion resistance and low-reflectance surface appearance
• Meets ANSI B18.3, ANSI B18.8.2, ANSI B2.2, and MS16555 fastener standards

Compatibility

Designed as a standard inch-series hex socket cap screw for use in any tapped or clearance hole requiring a 3/8-16 UNC thread and a 5/16-inch hex key drive.

Installation Notes

Installation requires a 5/16-inch hex key or socket bit driver. Always verify that the mating tapped hole is clean, undamaged, and cut to 3/8-16 UNC specification before driving the fastener. De-energize or lock out any equipment before replacing or installing fasteners on powered assemblies. Avoid exceeding the torque range appropriate for the fastener grade and base material to prevent thread stripping or fastener failure.