Holo-krome 73026 Hex Socket Cap Screw 6-40 Unf 3/4 in

Product Description

The HOLO-KROME 73026 is a hex socket cap screw designed for precision fastening applications requiring a compact, high-strength connection. Threaded 6-40 UNF with a 3/4-inch length under head, this screw is fully threaded and driven by a 7/64-inch hex key. It is manufactured from alloy steel and finished with black oxide coating, which provides mild corrosion resistance and reduces light reflection in finished assemblies. Machinists, millwrights, and mechanical contractors install this fastener where close-tolerance UNF threads and a low-profile socket drive are required. It conforms to ASME B18.3 and ASTM A574 standards.

This screw is suited for use in light mechanical assemblies, machine components, fixtures, and tooling where fine-thread engagement and controlled torque are critical. The 6-40 UNF thread form provides tighter thread pitch than coarse-thread alternatives, making it appropriate for thin materials and applications requiring precise clamp load. It is a standard choice in equipment manufacturing, instrumentation mounting, and general industrial assembly work.

Key Features

• 6-40 UNF fully threaded for fine-pitch, high-engagement fastening
• 3/4-inch length under head suits moderate-depth fastening applications
• 7/64-inch hex drive allows use with standard Allen keys and hex bit drivers
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide finish provides mild corrosion resistance and a non-reflective surface
• Conforms to ASME B18.3 dimensional standards

Compatibility

Designed as a standard ASME B18.3 hex socket cap screw in 6-40 UNF, suitable for tapped holes and threaded inserts machined to 6-40 UNF specifications in mechanical assemblies and fixtures.

Installation Notes

Installation is typically performed by machinists, maintenance technicians, or mechanical assemblers using a 7/64-inch hex key or Allen driver. Ensure the receiving tapped hole is clean and free of debris before driving. Do not exceed the rated torque for the 6-40 thread size as specified by applicable engineering standards. Apply thread-locking compound only where specified by the assembly design documentation.