Value Collection KP44170 Hex Head Cap Screw Grade 8

Product Description

The VALUE COLLECTION KP44170 is a Grade 8 steel hex head cap screw designed for high-strength fastening applications. It features a 1-8 UNC thread size and a 4.5-inch length under head, with partial threading along the shank. A zinc-plated finish provides baseline corrosion resistance in standard service environments. This fastener meets ASTM A354 BD specifications, making it suitable for structural and mechanical assemblies where verified tensile and proof load requirements apply. Machinists, millwrights, ironworkers, and general contractors commonly install this type of fastener in heavy equipment, structural steel connections, and industrial machinery.

The KP44170 is suited for inch-system bolted joints requiring a high-strength, partially threaded fastener. The partial thread allows the unthreaded shank to carry shear loads across mating surfaces, which is typical in clevis pins, flanged joints, and structural beam connections. Packaged in quantities of 10, this screw is appropriate for both single-job use and moderate-volume shop stock.

Key Features

• Grade 8 steel construction meets ASTM A354 BD proof load and tensile strength requirements
• 1-8 UNC partial threading leaves an unthreaded shank for shear-load applications
• Zinc-plated finish provides corrosion resistance for standard indoor and light-duty outdoor use
• Inch measurement system with 4.5-inch length under head for deep-reach fastening
• Sold in packs of 10 for convenient job-site or shop stocking

Compatibility

Designed as a direct-fit replacement or new-installation fastener for any bolted assembly requiring a 1-8 UNC Grade 8 hex head cap screw with a 4.5-inch length under head and partial threading.

Installation Notes

Installation should be performed by a qualified tradesperson following applicable structural or mechanical codes. Always verify the mating nut thread standard is UNC before assembly. Use a calibrated torque wrench and follow the fastener grade torque specifications provided by the equipment manufacturer or applicable engineering standards. Inspect threads for damage before installation and do not reuse fasteners that show signs of yielding or corrosion.