Holo-krome 68056 Low Socket Cap Screw 1/2-13 X 1-1/2 in

Product Description

The HOLO-KROME 68056 is a low socket cap screw designed for applications where standard cap screw head height creates clearance problems. Manufactured from alloy steel with a black oxide finish, this fastener meets ASME B18.3 and ASTM A574 standards. It features a 1/2-13 UNC thread — fully threaded under the head — and measures 1-1/2 inches in length under head. The low-profile head stands 0.2540 inches tall and accepts a 1/4-inch hex key drive. This type of fastener is installed by machinists, millwrights, and mechanical contractors working on assemblies with tight vertical clearances.

This screw is suited for industrial machinery, equipment panels, structural assemblies, and fabrication work where a standard socket head cap screw would interfere with mating surfaces or adjacent components. The fully threaded shank provides consistent clamping throughout the grip length, making it appropriate for shallow tapped holes and thin workpiece applications. The black oxide finish offers mild corrosion resistance and reduces surface glare in precision assemblies.

Key Features

• Low socket cap head profile — 0.2540 inches head height for tight-clearance installations
• Fully threaded 1/2-13 UNC coarse thread shank
• 1/4-inch hex socket drive for standard hex key or bit driver
• Alloy steel construction meeting ASTM A574 mechanical requirements
• Black oxide finish for mild corrosion resistance and reduced surface reflectivity
• Conforms to ASME B18.3 dimensional standards

Compatibility

Designed as an OEM-style and aftermarket replacement fastener for industrial and mechanical assemblies requiring a 1/2-13 UNC low socket cap screw per ASME B18.3.

Installation Notes

Installation is performed by qualified machinists, millwrights, or mechanical contractors. Ensure the mating tapped hole is clean, undamaged, and cut to 1/2-13 UNC specification before installation. De-energize and lock out all equipment before fastener replacement per applicable OSHA lockout/tagout procedures. Use a properly sized 1/4-inch hex key or bit to avoid rounding the drive socket.