Holo-krome 73022 Hex Socket Cap Screw 6-40 Unf 1/2 in

Product Description

The HOLO-KROME 73022 is a hex socket cap screw designed for applications requiring a compact, high-strength threaded fastener. Threaded 6-40 UNF with a 1/2 inch length under head, it accepts a 7/64 inch hex key drive and is fully threaded along its entire shank. Manufactured from alloy steel and finished with a black oxide coating, the 73022 delivers improved corrosion resistance alongside the high tensile strength expected from an alloy steel cap screw. It conforms to ASME B18.3 and ASTM A574 standards. This fastener is installed by machinists, maintenance technicians, and assembly professionals in precision mechanical and industrial applications.

The 73022 is suited for use in tight-clearance assemblies where a standard hex head fastener will not fit. The 6-40 UNF fine thread pitch provides stronger thread engagement and better resistance to loosening under vibration compared to coarse thread equivalents. Typical applications include instrument panels, light machinery, electronic enclosures, and other precision assemblies where a low-profile, flush-seating fastener is required. The black oxide finish makes it a common choice in applications where light corrosion protection and a non-reflective appearance are both factors.

Key Features

• 6-40 UNF fine thread for strong engagement and vibration resistance
• Fully threaded shank along the entire 1/2 inch length under head
• 7/64 inch hex socket drive for use in confined spaces
• Alloy steel construction meets ASTM A574 strength requirements
• Black oxide finish provides light corrosion and oxidation resistance
• Conforms to ASME B18.3 dimensional standards

Compatibility

Designed as an OEM-style replacement or standard-fit hex socket cap screw for assemblies specifying a 6-40 UNF fully threaded socket head fastener per ASME B18.3.

Installation Notes

Installation is performed using a 7/64 inch hex key or Allen driver; use of a calibrated torque driver is recommended in precision assemblies to avoid overloading the fine thread. Ensure mating tapped holes are clean and free of debris before driving. Do not use an impact driver on fine-thread socket cap screws of this size. Follow applicable industry or equipment manufacturer torque guidelines for the fastener grade and thread size.