Value Collection KP44167 Hex Head Cap Screw Grade 8

Product Description

The VALUE COLLECTION KP44167 is a Grade 8 steel hex head cap screw sized 1-8 x 3.5 inches, designed for high-strength bolted connections in demanding mechanical and structural applications. The screw features partial threading along the shank, a unified coarse (UNC) thread standard, and a zinc-plated finish that provides baseline corrosion resistance. It conforms to ASTM A354 Grade BD, a specification covering heavy hex bolts and screws intended for high-load fastening where tensile and proof-load requirements are critical. Tradespeople, maintenance technicians, and mechanical contractors use Grade 8 fasteners when standard hardware-grade screws lack the strength margin required by the application.

This hex head cap screw is suited for heavy equipment assembly, structural steel connections, machinery mounting, and industrial maintenance work where high-clamping-force fasteners are specified. The partially threaded shank allows the unthreaded portion to bear shear loads more effectively than a fully threaded fastener, making it a common choice in applications where the bolt passes through a clearance hole before engaging a tapped bore or nut. Sold in a package quantity of 10, it is appropriate for both single-repair jobs and small-batch maintenance tasks.

Key Features

• Grade 8 steel construction meets ASTM A354 BD for high tensile strength and proof load requirements
• Partially threaded shank improves shear load performance versus fully threaded fasteners
• Zinc-plated finish provides corrosion resistance in general-service environments
• UNC thread standard ensures broad compatibility with standard inch-system nuts and tapped holes
• Hex head drive accepts standard hex wrenches and impact sockets for installation and removal
• Package quantity of 10 per order supports small repairs and maintenance work

Compatibility

Designed as a high-strength replacement or new-installation fastener for 1-8 UNC threaded applications requiring Grade 8 tensile ratings and ASTM A354 BD compliance.

Installation Notes

Installation should be performed by a qualified mechanic or maintenance technician familiar with torque specifications for Grade 8 fasteners at this thread size. Always consult the equipment manufacturer or applicable structural engineering specifications for required torque values before installation. Use a calibrated torque wrench to achieve proper clamp load; do not rely on impact tools alone without a final torque verification step. Inspect mating threads and the bearing surface for damage or contamination before assembly.