Value Collection KP44029 5/16-18 X 3 in Grade 8 Cap Screw 50pk

Product Description

The VALUE COLLECTION KP44029 is a 5/16-18 x 3-inch hex head cap screw engineered for high-strength fastening applications. Manufactured from Grade 8 steel with a zinc-plated finish, this fastener delivers superior tensile strength and corrosion resistance compared to lower-grade alternatives. The partially threaded shank follows UNC thread standards and meets ASTM A354 BD specification, making it suitable for structural and heavy-duty mechanical assemblies. Each package contains 50 screws. Licensed trades professionals and maintenance technicians use this hardware in industrial equipment, structural steel connections, and heavy machinery where high-grade fasteners are required by code or engineering specification.

This cap screw is suited for applications demanding Grade 8 fastener performance, including equipment mounting, structural assemblies, and mechanical sub-systems found in commercial and industrial settings. The zinc-plated finish provides a base level of corrosion protection appropriate for indoor and moderately controlled environments. The 5/16-18 UNC thread pattern is a widely used coarse-thread standard, compatible with standard 5/16-18 hex nuts, lock nuts, and threaded plate inserts. Plumbers, HVAC technicians, electricians, and general mechanical contractors routinely use Grade 8 hardware when connecting flanges, brackets, equipment rails, and access panels where standard hardware-grade fasteners are insufficient.

Key Features

• Grade 8 steel construction meets ASTM A354 BD specification for high-strength fastening
• 5/16-18 UNC coarse-thread pattern for broad compatibility with standard hardware
• 3-inch length under head with partially threaded shank for clamping grip on thick stock
• Zinc-plated finish provides corrosion resistance in indoor and controlled environments
• Packaged in a 50-count quantity for job-site and shop use

Compatibility

Designed for use with standard 5/16-18 UNC hex nuts, flat washers, lock washers, and threaded inserts. Suitable as a direct replacement in any assembly specifying a 5/16-18 x 3-inch Grade 8 partially threaded hex head cap screw per ASTM A354 BD.

Installation Notes

Install with an appropriate hex wrench or socket drive rated for Grade 8 fastener torque requirements. Always consult the equipment manufacturer torque specification or applicable engineering standard before final tightening. Do not mix Grade 8 fasteners with lower-grade nuts or threaded inserts, as the mismatch can result in thread stripping or joint failure. Inspect threads for damage before installation and replace any fastener showing deformation or corrosion.