Holo-krome 72184 Hex Socket Cap Screw 3/8-16 Unc 5 in

Product Description

The HOLO-KROME 72184 is a partially threaded hex socket cap screw designed for high-strength bolted assemblies in mechanical, industrial, and trade applications. It features a 3/8-16 UNC thread size and measures 5 inches in length under the head. The 5/16-inch hex drive socket accepts a standard Allen key or hex bit driver. Constructed from alloy steel with a black oxide finish, this fastener resists corrosion and maintains structural integrity under load. It meets ASME B18.3 and ASTM A574 standards, confirming its suitability for demanding mechanical connections where tensile strength and dimensional consistency are critical.

This cap screw is suited for general mechanical assemblies, equipment mounting, and structural fastening in residential and commercial maintenance environments. The 3/8-16 UNC thread pitch is a widely used coarse-thread standard, making this fastener compatible with a broad range of tapped holes and standard hardware. The black oxide alloy steel construction is appropriate for interior applications and moderate-exposure environments where a non-reflective, corrosion-inhibiting finish is preferred. Trades including millwrights, pipefitters, HVAC technicians, and general maintenance mechanics regularly use this fastener type in equipment installation and repair work.

Key Features

• 3/8-16 UNC coarse thread for broad compatibility with standard tapped holes
• 5 inches length under head with partial threading for clamping strength
• 5/16-inch hex socket drive accepts standard Allen keys and hex bit drivers
• Alloy steel construction meets ASTM A574 high-strength fastener requirements
• Black oxide finish provides corrosion inhibition and a non-reflective surface
• Conforms to ASME B18.3 dimensional standard

Compatibility

Designed as a standard ASME B18.3 hex socket cap screw for use in any application requiring a 3/8-16 UNC partially threaded fastener with a 5/16-inch hex drive.

Installation Notes

Installation should be performed by a qualified mechanic or tradesperson using a properly sized 5/16-inch hex key or driver bit. Ensure the mating tapped hole meets 3/8-16 UNC specifications before installation. De-energize all equipment and relieve system pressure before fastening or removing hardware in live assemblies. Do not exceed the design torque rating of the joint or overtighten, which can cause thread stripping in softer base materials.