Value Collection 403084PR Hex Head Cap Screw 5/16-18 X 4 in

Product Description

The VALUE COLLECTION 403084PR is a 5/16-18 hex head cap screw designed for general-purpose mechanical fastening in structural and non-structural assemblies. Manufactured from Grade 2 steel with a zinc-plated finish, this fastener measures 4 inches under the head and features partial threading along the shank. The UNC thread standard ensures broad compatibility with standard tapped holes and nuts. The zinc coating provides baseline corrosion resistance suitable for indoor and light-duty outdoor applications. Installation requires a 1/2-inch wrench or socket. This screw is a staple fastener for maintenance, equipment assembly, and trade fabrication work across HVAC, plumbing, and general mechanical service.

This fastener is suited for residential and light commercial applications where a standard inch-series hex cap screw is required. Common install scenarios include equipment mounting, bracket fastening, panel attachment, and general mechanical assembly on steel or similar substrates. The partially threaded shank allows for clamping force between joined materials without thread engagement through the full grip length, which is useful when fastening two components of defined thickness.

Key Features

• 5/16-18 UNC thread for compatibility with standard inch-series nuts and tapped holes
• 4-inch length under head with partial threading for controlled clamping grip
• Grade 2 steel construction suitable for general-purpose, non-critical fastening
• Zinc-plated finish provides baseline corrosion resistance for light-duty environments
• 1/2-inch hex drive accepts standard wrenches and sockets

Compatibility

Designed as a general-purpose inch-series hex head cap screw compatible with any 5/16-18 UNC tapped hole or standard hex nut of the same thread specification.

Installation Notes

Installation is performed with a 1/2-inch open-end, box, or socket wrench. Always ensure the mating tapped hole or nut meets or exceeds the Grade 2 rating to avoid stripping. De-energize, depressurize, or shut off any system before installing fasteners on live equipment. Do not substitute Grade 2 fasteners in applications that specify Grade 5 or Grade 8 hardware.