Holo-krome 73168 Hex Socket Cap Screw 5/8-18 Unf 4 in

Product Description

The HOLO-KROME 73168 is a hex socket cap screw designed for high-strength fastening in mechanical assemblies, industrial equipment, and structural connections. It features a 5/8-18 UNF thread and a 4-inch length under head with partial threading. The 1/2-inch hex drive accepts standard hex keys and allen wrenches for reliable torque transmission. Constructed from alloy steel with a black oxide finish, this fastener delivers solid corrosion resistance in controlled environments. It conforms to ASME B18.3 and ASTM A574 standards, making it a recognized choice for engineered applications where fastener grade and geometry must meet documented specifications.

This screw is suited for use in machinery, hydraulic equipment, tooling fixtures, and general industrial assemblies where a UNF fine-thread engagement and a recessed hex drive are required. The partial threading provides a smooth shank section, which is useful in applications requiring shear strength or precision hole alignment. Typical installers include maintenance mechanics, millwrights, and industrial technicians working on close-tolerance metal assemblies.

Key Features

• 5/8-18 UNF fine thread for precise clamping in metal-to-metal applications
• 4-inch length under head with partial threading for combined shear and tensile load performance
• 1/2-inch hex socket drive for standard allen key or hex bit installation
• Alloy steel construction meets ASTM A574 high-strength fastener requirements
• Black oxide finish provides mild corrosion resistance and reduces galling
• Conforms to ASME B18.3 dimensional standards

Compatibility

Designed as a standard ASME B18.3 hex socket cap screw for use in tapped holes accepting 5/8-18 UNF threads in metal assemblies, machinery, and industrial fixtures.

Installation Notes

Installation is typically performed by maintenance mechanics or industrial technicians using a 1/2-inch hex key or hex bit driver. Ensure the mating tapped hole is clean and free of debris before threading the fastener. De-energize and lock out any equipment before accessing the fastening location per applicable safety procedures. Do not exceed the rated torque range for ASTM A574 alloy steel cap screws of this diameter and thread pitch.