Value Collection MP39000 Hex Head Cap Screw 1/4-20 X 1/2 in Grade 8

Product Description

The VALUE COLLECTION MP39000 is a fully threaded hex head cap screw designed for high-strength fastening applications in mechanical, industrial, and trade service work. Manufactured from Grade 8 steel with a zinc yellow dichromate finish, this fastener delivers strong clamping force and corrosion resistance in demanding environments. The 1/4-20 UNC thread pattern and 1/2-inch length under head make it a common choice for general assembly, equipment mounting, and structural connections where a high-tensile fastener is required. Meets ASME B18.2.1 dimensional standards. Sold in a pack of 50.

This cap screw is suited for residential and commercial mechanical installations, general fabrication, and trade service applications requiring a reliable high-strength inch-series fastener. The 1/4-20 UNC thread is a widely used coarse-thread specification found across HVAC equipment, electrical enclosures, plumbing fixtures, pump housings, and general metalwork. Full threading along the shank provides maximum thread engagement in blind holes and thin material applications.

Key Features

• Grade 8 steel construction provides high tensile and proof load strength
• Zinc yellow dichromate finish offers corrosion protection and visual identification
• Fully threaded shank for maximum thread engagement in all material thicknesses
• 1/4-20 UNC coarse thread — widely compatible across standard inch-series hardware
• Meets ASME B18.2.1 dimensional standard for hex head cap screws
• Sold in a 50-piece pack for job-site and service inventory use

Compatibility

Designed for use in standard 1/4-20 UNC tapped holes and with matching 1/4-20 hex nuts and washers. Suitable as a direct replacement for any ASME B18.2.1 compliant 1/4-20 x 1/2-inch Grade 8 hex head cap screw in inch-series assemblies.

Installation Notes

Install using a standard hex wrench or socket driver sized for a 1/4-inch hex head cap screw. Ensure mating threads are clean and free of debris before installation. Grade 8 fasteners are not recommended for applications where hydrogen embrittlement is a concern without consulting the equipment manufacturer. Follow applicable mechanical codes and equipment service manuals for proper fastener torque and replacement procedures.