Holo-krome 78120 Hex Socket Cap Screw 1/2-13 Unc

Product Description

The HOLO-KROME 78120 is a hex socket cap screw with a 1/2-13 UNC thread size and a 2-inch length under head. It is fully threaded and driven by a 3/8-inch hex key. Constructed from 18-8 stainless steel with a bright, uncoated finish, it provides corrosion resistance in wet, chemical-exposed, and outdoor environments. It meets ASME B18.3 and ASTM F837 fastener standards. This screw is commonly installed by mechanical contractors, millwrights, pipefitters, and maintenance technicians in applications where stainless material is required for durability and cleanliness.

The 78120 is suited for structural and mechanical assembly work in HVAC equipment, plumbing fixtures, pool and spa equipment frames, and general industrial hardware. The fully threaded design allows consistent clamping force across the full engaged length. Applications include panel mounting, bracket fastening, and equipment frame assembly where a flush or low-profile cap head with internal hex drive is preferred over external hex fasteners.

Key Features

• 1/2-13 UNC thread for compatibility with standard inch-series tapped holes
• 2-inch length under head, fully threaded for maximum thread engagement
• 3/8-inch hex socket drive for use with standard hex keys and socket tools
• 18-8 stainless steel construction resists corrosion in wet and chemical environments
• Bright, uncoated finish meets ASME B18.3 and ASTM F837 standards

Compatibility

Designed as a standard inch-series hex socket cap screw for use in any application requiring a 1/2-13 UNC thread. Fits standard 1/2-13 tapped holes per ASME B18.3 specifications.

Installation Notes

Install using a 3/8-inch hex key or socket driver. Ensure the mating tapped hole is clean and free of debris before threading. Stainless steel fasteners are susceptible to galling during installation — apply an anti-seize compound to the threads when fastening into stainless or aluminum tapped holes. Follow applicable mechanical codes and equipment manufacturer torque guidelines for the specific joint application.