Value Collection D30034 Hex Head Cap Screw 5/16-18

Product Description

The VALUE COLLECTION D30034 is a 5/16-18 hex head cap screw machined from Grade 5 steel with a zinc-plated finish. The fastener measures 2.25 inches under the head and features partial threading along the shank. It conforms to ASME B18.2.1 and SAE J429 dimensional and strength standards, making it a dependable choice for structural and mechanical assemblies. The UNC thread form seats reliably in standard tapped holes and mating nuts. Installers in HVAC, plumbing, electrical, and general mechanical trades reach for this size when securing brackets, panels, and equipment frames where a controlled grip length and clamping force are required.

This fastener is suited for general-purpose bolted connections in both residential and light commercial applications. Typical uses include securing equipment mounting brackets, junction box enclosures, conduit supports, fan assemblies, and similar structural components. The zinc plating provides a baseline level of corrosion resistance for indoor and sheltered outdoor environments. It is sold individually, with a minimum order quantity of 25 pieces per order.

Key Features

• 5/16-18 UNC thread form for compatibility with standard tapped holes and hex nuts
• 2.25-inch length under head with partial threading for controlled grip length
• Grade 5 steel construction meets SAE J429 mechanical property requirements
• Zinc-plated finish for baseline corrosion resistance in sheltered environments
• Meets ASME B18.2.1 dimensional standards for hex head cap screws

Compatibility

Designed as a standard UNC hex head cap screw for use in any application calling for a 5/16-18 x 2-1/4-inch Grade 5 fastener in ferrous or non-ferrous assemblies.

Installation Notes

Install using a standard hex wrench, socket, or combination wrench sized for a 5/16-inch hex head cap screw. Ensure mating threads are clean and free of debris before driving. Always de-energize and lock out equipment before fastening components on electrical or mechanical systems per applicable OSHA and NEC lockout/tagout procedures. Do not overtighten — follow the torque specifications provided in the equipment manufacturer's service documentation.