Value Collection 403314BR Hex Head Cap Screw 7/8-9x3

Product Description

The VALUE COLLECTION 403314BR is a partially threaded hex head cap screw designed for general-purpose fastening applications across mechanical, structural, and industrial assembly work. Manufactured from Grade 2 steel with a zinc-plated finish, this fastener measures 7/8-9 thread size by 3 inches in length under head, following Unified National Coarse (UNC) thread standards. The hex head accepts a 1-5/16 inch hex key or wrench. The zinc coating provides basic corrosion resistance suitable for indoor and light-duty outdoor environments. Machinists, millwrights, maintenance technicians, and general contractors install this type of fastener in equipment assembly, structural connections, and machine base mounting.

This cap screw is suited for applications requiring a standard UNC inch-series partially threaded fastener in the 7/8-9 size range. The partial threading allows the unthreaded shank to bear shear loads, which is common in bolted joints where precise alignment and shear resistance matter. Typical applications include machinery mounting, steel fabrication, equipment frames, and maintenance repairs where Grade 2 steel tensile strength is sufficient for the load requirements.

Key Features

• 7/8-9 UNC thread size for compatibility with standard inch-series nuts and tapped holes
• 3-inch length under head with partial threading to support shear load transfer at the shank
• Grade 2 steel construction for general-purpose structural and mechanical fastening
• Zinc-plated finish provides basic corrosion resistance in dry and light-moisture environments
• 1-5/16 inch hex key size fits standard hex wrenches and impact sockets
• Weighs 0.68 pounds per unit — accounts for handling in bulk assembly work

Compatibility

Designed for use with standard 7/8-9 UNC hex nuts, flat washers, and tapped holes following Unified National Coarse inch-series thread standards.

Installation Notes

Installation is performed using a 1-5/16 inch wrench or impact socket. Always ensure the mating nut or tapped hole is the correct 7/8-9 UNC thread specification before installation to avoid cross-threading. Torque to the value specified by the equipment manufacturer or applicable structural standard for Grade 2 fasteners — do not substitute Grade 2 hardware where Grade 5 or Grade 8 is specified. Follow applicable fastener installation guidelines from ASME or ASTM standards as required by the job specification.