Holo-krome 78118 Hex Socket Cap Screw 1/2-13 Unc

Product Description

The HOLO-KROME 78118 is a hex socket cap screw designed for applications requiring a strong, corrosion-resistant threaded fastener. It features a 1/2-13 UNC thread size, a 1-3/4 inch length under head, and is fully threaded from head to tip. The drive is a 3/8 inch hex socket, compatible with standard hex keys and socket drivers. Manufactured from 18-8 stainless steel with a bright, uncoated finish, this fastener meets ASME B18.3 and ASTM F837 standards. It is suited for maintenance, mechanical assembly, and equipment fabrication tasks across industrial and trade environments.

This cap screw is used in mechanical assemblies, structural fastening, and equipment installations where a flush or low-profile head is required. The hex socket drive allows installation in tight clearance areas where a wrench cannot access a hex head. The stainless steel construction makes it appropriate for wet, corrosive, or food-adjacent environments. It is commonly installed by millwrights, pipefitters, HVAC technicians, and general mechanical contractors during equipment assembly or field repair work.

Key Features

• 1/2-13 UNC thread size for broad hardware compatibility
• 1-3/4 inch length under head, fully threaded
• 3/8 inch hex socket drive for use with standard Allen keys or socket drivers
• 18-8 stainless steel construction provides corrosion resistance
• Bright, uncoated finish — no added coating to interfere with thread fit
• Meets ASME B18.3 and ASTM F837 fastener standards

Compatibility

Designed as a standard 1/2-13 UNC hex socket cap screw suitable for use in any application requiring a fully threaded, socket-drive cap screw conforming to ASME B18.3 dimensions.

Installation Notes

Install with a calibrated torque wrench using a 3/8 inch hex bit to avoid rounding the drive socket. De-energize or depressurize any equipment before fastener replacement or assembly work. When installing stainless steel fasteners into stainless threaded holes, apply an anti-seize compound to prevent galling. Follow applicable mechanical codes and equipment manufacturer torque guidelines for the specific assembly.