Value Collection D30027 Hex Head Cap Screw 5/16-18 X 3/4 in

Product Description

The VALUE COLLECTION D30027 is a fully threaded hex head cap screw designed for general-purpose fastening in mechanical, structural, and trade assembly applications. Sized at 5/16-18 (UNC thread) with a 3/4-inch length under head, this fastener is manufactured from Grade 5 steel with a zinc-plated finish for basic corrosion resistance. It conforms to ASME B18.2.1 dimensional standards, making it a reliable choice when a specified, code-traceable fastener is required. Electricians, HVAC technicians, plumbers, and general contractors reach for this size regularly when securing equipment brackets, junction boxes, pipe hangers, and mechanical assemblies.

This screw is suited for light-to-medium duty fastening tasks in both residential and commercial settings. Common applications include securing HVAC equipment panels, electrical enclosures, plumbing support brackets, and general sheet metal or structural steel assemblies where a standard UNC 5/16-18 threaded fastener is specified. The fully threaded shank allows engagement along the entire length, which is particularly useful in thin-material or close-tolerance installations.

Key Features

• 5/16-18 UNC thread for wide compatibility with standard tapped holes and nuts
• 3/4-inch length under head — fully threaded for maximum thread engagement
• Grade 5 steel construction provides adequate tensile strength for medium-duty mechanical fastening
• Zinc-plated finish offers basic corrosion protection in dry or mildly humid environments
• Meets ASME B18.2.1 dimensional standards for consistent fit and interchangeability
• Hex drive head accepts standard hex keys, sockets, and wrenches

Compatibility

Designed as a standard UNC hex head cap screw for use wherever a 5/16-18 x 3/4-inch Grade 5 fastener is specified per ASME B18.2.1.

Installation Notes

Install using an appropriately sized hex socket or wrench; do not over-torque, as Grade 5 steel has defined proof-load limits. De-energize and lock out all electrical equipment before fastening near live panels or enclosures per NFPA 70E requirements. For outdoor or high-moisture environments, consider a higher-grade corrosion-resistant finish, as zinc plating provides limited protection in those conditions. Inspect threads before installation to ensure no damage that could compromise fastener integrity.