Value Collection D30029 Hex Head Cap Screw 5/16-18

Product Description

The VALUE COLLECTION D30029 is a fully threaded hex head cap screw designed for general-purpose fastening in mechanical, structural, and equipment assembly applications. It features a 5/16-18 UNC thread size and a 1-inch length under head, manufactured from Grade 5 steel with a zinc-plated finish for corrosion resistance. Conforming to ASME B18.2.1, this fastener meets widely accepted dimensional standards for inch-series hex cap screws. It is a standard trade-supply item installed by maintenance technicians, millwrights, HVAC service personnel, and general contractors wherever a reliable medium-strength threaded fastener is required.

This cap screw is suited for residential and light commercial equipment assembly, panel mounting, bracket installation, and general mechanical repairs. The 5/16-18 UNC thread pattern is one of the most common inch-series coarse-thread sizes found in HVAC equipment housings, electrical enclosures, plumbing fixture brackets, and structural sub-assemblies. The zinc plating provides a basic level of protection against oxidation in dry to mildly humid indoor environments.

Key Features

• 5/16-18 UNC fully threaded profile for maximum thread engagement across the full 1-inch length under head
• Grade 5 steel construction provides medium-strength performance suitable for general mechanical fastening
• Zinc-plated finish offers corrosion resistance for indoor and light-duty applications
• Conforms to ASME B18.2.1 for consistent dimensional tolerances across the hex head and thread form
• Inch system of measurement; compatible with standard SAE hex drive tools

Compatibility

Designed as a standard inch-series hex head cap screw for use wherever a 5/16-18 UNC fastener is specified in equipment, bracket, or structural assembly applications.

Installation Notes

Installation requires a standard 1/2-inch hex wrench or socket driver. Always ensure mating threads are clean and free of debris before driving the fastener. Do not exceed the rated clamp load for Grade 5 fasteners; consult the equipment manufacturer's torque specification table for the applicable joint. Power down or de-energize any equipment before accessing internal fasteners in electrical or HVAC assemblies.