Value Collection KP44148 Hex Cap Screw 7/8-9 X 2-1/2 in Grade 8

Product Description

The VALUE COLLECTION KP44148 is a hex head cap screw intended for heavy-duty fastening applications in mechanical, structural, and industrial assembly work. Manufactured from Grade 8 steel with a zinc-plated finish, this fastener carries a 7/8-9 UNC thread form and measures 2-1/2 inches under the head. The partial threading leaves a smooth shank section that helps maintain shear strength in bolted joints. Compliance with ASTM A354 BD confirms the mechanical property requirements — proof load, tensile strength, and yield strength — that trades rely on when specifying high-strength fasteners in load-bearing connections. Sold in a package quantity of 25.

This screw is suited for use in steel-to-steel connections, equipment mounting, structural steel fabrication, and general industrial maintenance where high-tensile, inch-series fasteners are required. The UNC (Unified National Coarse) thread standard makes it compatible with standard tapped holes and nuts in that thread class. Typical installers include millwrights, ironworkers, pipefitters, and maintenance mechanics working on commercial and industrial equipment or structural assemblies.

Key Features

• Grade 8 steel construction meets ASTM A354 BD mechanical property requirements
• 7/8-9 UNC thread — coarse pitch for fast engagement and resistance to cross-threading
• Partially threaded shank preserves shear load capacity across the grip length
• Zinc-plated finish provides baseline corrosion resistance for dry indoor environments
• 2-1/2 inch length under head suits medium to heavy grip-length applications
• Packaged in quantities of 25 for job-site and shop inventory use

Compatibility

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

Installation Notes

Installation should be performed by qualified mechanics or tradespeople following applicable torque specifications from the fastener manufacturer or the governing structural or equipment standard for the application. Ensure mating threads and bearing surfaces are clean and free of debris before installation. Do not use impact tools at full torque without a torque-limiting method, as Grade 8 fasteners can be over-torqued and damaged. Always verify that the fastener grade and thread class match the joint design requirements before installation.