Bowmalloy 36217 Hex Head Cap Screw 1-8 X 3 in Grade 9

Product Description

The BOWMALLOY 36217 is a fully threaded hex head cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. Built from Grade 9 alloy steel with a zinc-plated clear chromate finish, this fastener delivers superior tensile strength over standard Grade 5 or Grade 8 hardware while providing baseline corrosion resistance in protected environments. The 1-8 thread size with a 3-inch length under head makes it well suited for heavy-load bolted connections where reliable clamping force is critical. Tradespeople, MRO technicians, and millwrights reach for Grade 9 hardware when joint integrity under dynamic or shock loading is the primary concern.

This cap screw is used across a range of industrial applications including equipment mounting, machinery assembly, structural steel connections, and heavy-duty fabrication work. The inch-system threading and hex drive style make it compatible with standard SAE tooling found in most trade shops and field service kits. Its fully threaded shank allows maximum thread engagement across the full 3-inch length, providing consistent clamping throughout the grip range. Sold in packages of 10, this SKU suits both single-repair and light-volume production needs.

Key Features

• Grade 9 alloy steel construction for high tensile strength beyond standard Grade 8 fasteners
• Fully threaded shank maximizes thread engagement along the entire 3-inch length
• Zinc-plated clear chromate finish provides corrosion resistance in dry or protected indoor environments
• 1-8 UNC inch-series thread compatible with standard SAE hex tooling
• Hex head drive style allows high torque application with common wrenches and sockets
• Sold in packs of 10 for single-job repair or light-production use

Compatibility

Designed as an inch-series hex head cap screw for use in standard 1-8 UNC tapped holes in industrial machinery, structural assemblies, and mechanical equipment requiring Grade 9 alloy steel fasteners.

Installation Notes

Installation is performed by millwrights, maintenance technicians, and mechanical tradespeople using standard SAE hex wrenches or impact sockets rated for the fastener size. Always verify the tapped hole thread class and material compatibility before installation to ensure proper fit and clamp load. Inspect threads for damage or contamination prior to assembly. Do not mix inch-series and metric fasteners in the same joint.