Value Collection D30030 Hex Head Cap Screw 5/16-18

Product Description

The VALUE COLLECTION D30030 is a fully threaded hex head cap screw designed for general mechanical assembly and structural fastening applications. Manufactured from Grade 5 steel with a zinc-plated finish, this fastener meets ASME B18.2.1 standards for dimensional accuracy and consistency. The 5/16-18 UNC thread size and 1-1/4 inch length under head make it a common choice for medium-duty bolted connections across a wide range of trade and industrial settings. The zinc plating provides basic corrosion resistance in dry to mildly humid environments.

This cap screw is suited for residential and light commercial mechanical installations where Grade 5 steel fasteners are specified. Typical applications include equipment mounting, bracket attachment, panel securing, and general assembly work in HVAC, plumbing, electrical, and pool equipment service contexts. It is fully threaded, making it usable in through-hole and tapped-hole configurations without the need for a nut when threading into a tapped bore of sufficient depth.

Key Features

• 5/16-18 UNC fully threaded profile for consistent thread engagement
• Grade 5 steel construction for reliable strength in medium-duty fastening
• Zinc-plated finish provides basic corrosion resistance
• Meets ASME B18.2.1 dimensional standards
• 1-1/4 inch length under head suits a wide range of standard assembly thicknesses

Compatibility

Designed as a standard UNC hex head cap screw for use wherever a 5/16-18 x 1-1/4 inch Grade 5 fastener is specified in mechanical, HVAC, plumbing, electrical, or pool equipment assemblies.

Installation Notes

Install using a 1/2 inch hex wrench or socket driver rated for the appropriate torque range as specified by the equipment manufacturer or applicable code. Power down or depressurize any system before servicing fastened components. Do not overtighten into tapped aluminum or plastic bores, as Grade 5 steel threads can strip softer base materials. Follow applicable mechanical codes and equipment service documentation for proper fastener torque and replacement procedures.