Value Collection 403058PR Hex Head Cap Screw 5/16-18 X 7/8 in

Product Description

The VALUE COLLECTION 403058PR is a fully threaded hex head cap screw designed for general-purpose fastening in mechanical, structural, and trade applications. Manufactured from Grade 2 steel with a zinc-plated finish, this fastener measures 5/16-18 thread size and 7/8 inches in length under the head. The zinc coating provides basic corrosion resistance in indoor and light-duty outdoor environments. Driven with a 1/2-inch hex key or standard hex wrench, this screw follows the Unified National Coarse (UNC) thread standard, making it compatible with the vast majority of tapped holes and nuts in inch-based assemblies. It is a common go-to fastener for HVAC brackets, electrical enclosures, plumbing supports, and general equipment assembly.

This fastener is suited for residential and light commercial applications where a fully threaded, coarse-thread inch fastener is required. Typical installation scenarios include securing sheet metal brackets, mounting electrical panels or junction boxes, assembling HVAC equipment frames, and attaching plumbing support hardware. The Grade 2 steel construction meets standard strength requirements for non-critical structural connections. Sold individually, with a minimum order quantity of 100 units, making it appropriate for stocking in a service van or shop supply inventory.

Key Features

• Fully threaded shank for maximum thread engagement throughout the fastened joint
• 5/16-18 UNC thread — the most common coarse-thread inch size in trade hardware
• Zinc-plated finish for basic corrosion resistance in indoor and light-duty environments
• Grade 2 steel construction meets general-purpose strength requirements
• 1/2-inch hex drive fits standard wrenches and sockets found in any trade toolkit
• 7/8-inch length under head suits thin-to-medium material stack-ups

Compatibility

Designed for use with standard 5/16-18 UNC tapped holes and hex nuts in inch-measurement assemblies across HVAC, plumbing, electrical, and general mechanical applications.

Installation Notes

Install using a 1/2-inch open-end wrench, box wrench, or socket. Ensure the mating hole or nut is tapped to 5/16-18 UNC before installation to avoid cross-threading. De-energize any electrical equipment and shut off relevant systems before fastening hardware in live panels or pressurized assemblies. Do not exceed the torque capacity appropriate for Grade 2 steel fasteners of this size as defined by the applicable equipment manufacturer or applicable code.