Holo-krome 78072 Hex Socket Cap Screw 5/16-18 Unc

Product Description

The HOLO-KROME 78072 is a hex socket cap screw designed for secure, high-torque fastening in applications where a flush or recessed head is required. It features a 5/16-18 UNC thread with a 0.5 inch length under head and accepts a 1/4 inch hex drive. The fastener is fully threaded along its shank, maximizing thread engagement across the full clamped length. Constructed from 18-8 stainless steel with a bright, uncoated finish, it provides corrosion resistance suitable for both indoor and outdoor environments. Tradespeople and maintenance professionals specify this screw where standard slotted or Phillips heads are not practical and a clean socket drive is preferred.

This socket cap screw is appropriate for light structural, mechanical, and assembly applications across commercial and industrial settings. Common installation scenarios include equipment frames, junction boxes, pump housings, brackets, and panel assemblies. The fully threaded design makes it especially useful in thin-material applications where partial threading would leave unengaged threads. It conforms to ASME B18.3 and ASTM F837 standards, making it suitable for use in regulated fabrication and maintenance environments.

Key Features

• 5/16-18 UNC thread for broad compatibility with standard inch-series tapped holes
• Fully threaded shank maximizes grip in thin stock and short-depth applications
• 1/4 inch hex socket drive for reliable torque transfer with standard hex keys or Allen-drive bits
• 18-8 stainless steel construction resists corrosion in wet or outdoor environments
• Bright uncoated finish maintains dimensional accuracy for precise fit in close-tolerance tapped holes
• Meets ASME B18.3 and ASTM F837 fastener standards

Compatibility

Designed as an OEM-style replacement or new-installation fastener for any application using 5/16-18 UNC inch-series socket cap screws per ASME B18.3.

Installation Notes

Install using a calibrated 1/4 inch hex key or Allen-drive bit. Verify the receiving hole is tapped to 5/16-18 UNC before installation and free of debris. De-energize or lock out any equipment before accessing fastener locations on live machinery. Avoid over-torquing stainless steel fasteners, as galling can occur without anti-seize compound when threading into stainless or aluminum materials.