Value Collection 403066PR Hex Head Cap Screw 5/16-18

Product Description

The Value Collection 403066PR is a 5/16-18 x 1-3/4 inch partially threaded hex head cap screw designed for general-purpose fastening in mechanical, structural, and industrial assembly applications. Manufactured from Grade 2 steel with a zinc-plated finish, this fastener provides corrosion resistance suitable for indoor and light-duty outdoor use. The 5/16-18 UNC thread is a coarse-pitch standard, making it compatible with a wide range of tapped holes and hex nuts. The partially threaded shank allows the unthreaded section to bear shear loads or serve as a shoulder in certain joint configurations. Installed with a 1/2-inch hex wrench or socket, it fits standard tooling used across trade, MRO, and maintenance environments.

This fastener is suited for light-to-medium duty mechanical assemblies in HVAC equipment panels, electrical enclosures, plumbing fixtures, pump housings, and general equipment maintenance. The coarse 5/16-18 UNC thread engages quickly and resists cross-threading in field conditions. The zinc coating meets basic corrosion resistance requirements for dry or low-humidity environments. Trade professionals and maintenance technicians commonly use this size for securing brackets, cover panels, and component mounting hardware where Grade 2 steel strength is adequate for the load requirement.

Key Features

• 5/16-18 UNC coarse thread for fast engagement and broad compatibility with standard tapped hardware
• Partially threaded shank provides an unthreaded bearing surface for shear load applications
• Grade 2 steel construction meets standard tensile requirements for general-purpose fastening
• Zinc-plated finish offers basic corrosion resistance for dry and low-humidity environments
• 1/2-inch hex drive fits common socket and wrench tooling used across all trades

Compatibility

Designed for use in any application requiring a 5/16-18 UNC partially threaded hex head cap screw with Grade 2 steel strength and zinc-plated finish.

Installation Notes

Install with a 1/2-inch hex socket or open-end wrench. Ensure the mating thread is clean and free of debris before engagement. Do not exceed the torque rating appropriate for Grade 2 steel at this thread size, and avoid over-torquing into soft or tapped aluminum substrates. Always de-energize electrical systems and relieve pressure from fluid systems before accessing panels or components secured with this fastener.