Value Collection D39012 Hex Head Cap Screw 1/4-20 X 3 in

Product Description

The VALUE COLLECTION D39012 is a 1/4-20 UNC hex head cap screw measuring 3 inches under the head, manufactured from Grade 8 steel with a zinc yellow dichromate finish. Grade 8 steel provides high tensile strength suitable for demanding mechanical and structural fastening applications. The zinc yellow dichromate coating adds corrosion resistance while serving as a visual identifier for the Grade 8 designation. This screw is partially threaded and conforms to ASME B18.2.1 dimensional standards. It is installed with a standard hex wrench or socket and is suited for use by mechanics, millwrights, electricians, and general trade professionals working with heavy-duty fastener assemblies.

This cap screw is used in a wide range of industrial, mechanical, and trade applications where a high-strength, inch-series fastener is required. Partially threaded shanks are common in applications where clamping force is needed without full thread engagement through the joint. Typical scenarios include equipment mounting, bracket fabrication, machine assembly, and structural connections in both commercial and industrial settings. The 1/4-20 thread size and 3-inch length make this a versatile fastener across many trade disciplines.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• Zinc yellow dichromate finish provides corrosion resistance and identifies Grade 8 rating
• Partially threaded shank allows proper clamping in through-bolt applications
• Conforms to ASME B18.2.1 for consistent dimensional tolerances
• 1/4-20 UNC thread standard for broad tool and nut compatibility

Compatibility

Designed for use with standard 1/4-20 UNC hex nuts, flat washers, and lock washers in inch-series fastener assemblies conforming to ASME B18.2.1 specifications.

Installation Notes

Install and remove using a properly sized hex socket or open-end wrench to avoid fastener damage. Ensure mating threads are clean and free of debris before installation. De-energize and lock out any equipment before performing fastener service on electrical or mechanical assemblies per applicable OSHA lockout/tagout procedures. Do not use impact tools at full torque on Grade 8 fasteners without confirming appropriate torque specifications for the joint design.