Bowmalloy 36449 Hex Head Cap Screw 5/8-18 X 2 in Grade 9

Product Description

The BOWMALLOY 36449 is a Grade 9 alloy steel hex head cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. It features a 5/8-18 UNF thread size with a 2-inch length under the head and is partially threaded for precise clamping in bolted joints. The clear zinc chromate finish provides corrosion resistance in moderate environments. This fastener is installed by machinists, millwrights, equipment technicians, and mechanical contractors where high-tensile, fine-thread fastening is required.

This hex head cap screw is suited for use in heavy equipment, industrial machinery, and mechanical assemblies that demand a fine-thread, high-grade fastener. The 5/8-18 UNF thread pattern offers greater thread engagement and vibration resistance compared to coarse-thread equivalents, making it a common choice in close-tolerance applications. It is appropriate for both OEM manufacturing and field repair scenarios where Grade 9 alloy steel strength is specified.

Key Features

• Grade 9 alloy steel construction for high tensile strength in demanding fastening applications
• 5/8-18 UNF fine thread provides superior thread engagement and vibration resistance
• Partially threaded shank allows precise clamping force without thread interference in the grip zone
• Clear zinc chromate finish offers moderate corrosion protection in industrial environments
• Inch measurement system for compatibility with standard SAE tooling and hardware

Compatibility

Designed as a high-strength replacement or OEM-style fastener for applications specifying a 5/8-18 UNF Grade 9 hex head cap screw with a 2-inch length under head and partial threading.

Installation Notes

Installation is performed by qualified mechanical or maintenance technicians using standard SAE hex tooling. Always de-energize and lock out equipment before replacing structural fasteners. Verify thread engagement depth and mating hardware grade before torquing. Do not mix Grade 9 fasteners with lower-grade nuts or threaded inserts not rated for the application.