Holo-krome 73126 Hex Socket Cap Screw 7/16-20 Unf

Product Description

The HOLO-KROME 73126 is a hex socket cap screw designed for high-strength fastening applications requiring a compact, recessed-drive profile. Sized at 7/16-20 UNF with a 1-1/2 inch length under head, this screw is fully threaded and driven with a 3/8 inch hex key. It is manufactured from alloy steel and finished with a black oxide coating that provides moderate corrosion resistance and reduces light reflection. The 7/16-20 UNF thread form is a fine-pitch designation suited to applications where vibration resistance and precise clamping force matter. Trades handling mechanical assemblies, HVAC equipment mounting, and industrial equipment maintenance will encounter this fastener in standard service.

This screw is used in mechanical and industrial assembly work where a flush or low-profile head is required and torque must be applied through an internal hex drive. Its fine-thread UNF designation makes it appropriate for metal-to-metal joints in moderate to high vibration environments. The black oxide finish is common in applications where dimensional tolerance is critical and heavy plating would interfere with fit. Typical installers include industrial mechanics, millwrights, HVAC equipment assemblers, and field service technicians working on manufactured equipment.

Key Features

• 7/16-20 UNF fine-thread form for vibration-resistant clamping in metal assemblies
• Fully threaded 1-1/2 inch length under head for maximum thread engagement
• 3/8 inch internal hex drive for high-torque application with standard hex keys or Allen drivers
• Alloy steel construction for tensile strength exceeding standard carbon steel fasteners
• Black oxide finish for mild corrosion resistance and reduced surface reflectivity
• Manufactured to ASME B18.3 and ASTM A574 standards

Compatibility

Designed as a standard hex socket cap screw to ASME B18.3 and ASTM A574 specifications, compatible with any application calling for a 7/16-20 UNF socket head cap screw with a 1-1/2 inch length under head.

Installation Notes

Installation requires a 3/8 inch hex key or socket-style Allen driver capable of delivering appropriate torque for the alloy steel grade. Always verify that the mating tapped hole thread form matches 7/16-20 UNF before driving. Follow the equipment manufacturer torque specifications for the assembly being fastened. Do not substitute impact drivers without a properly rated hex bit rated for socket head cap screw installation.