Bowmalloy BOWMP36116 Hex Head Cap Screw 1/2-13 X 4 in

Product Description

The BOWMALLOY BOWMP36116 is a Grade 9 steel hex head cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assembly work. The screw measures 1/2-13 thread size with a 4-inch length under the head and features partial threading along the shank. The Bowma-Guard finish provides corrosion resistance suited for demanding environments. This fastener is installed by millwrights, maintenance technicians, and mechanical contractors working on heavy equipment, structural connections, and similar assemblies requiring a high-grade fastener with verified tensile and proof-load performance.

This cap screw is appropriate for industrial and commercial fastening scenarios where Grade 9 strength requirements apply. Partial threading allows for precise clamping force and shank engagement in through-bolt applications. The 1/2-13 unified coarse thread series is widely used in heavy equipment, agricultural machinery, structural steel work, and general industrial maintenance. Sold in packages of 10 per the supplier-stated package quantity.

Key Features

• Grade 9 steel construction for high-strength fastening above SAE Grade 8 specifications
• 1/2-13 unified coarse thread for broad tooling and nut compatibility
• 4-inch length under head with partial threading for precise shank engagement
• Bowma-Guard finish for added corrosion resistance in harsh environments
• Hex head drive compatible with standard 3/4-inch hex sockets and wrenches
• Package quantity of 10 units per pack

Compatibility

Designed as a high-strength replacement or new-install fastener for applications specifying a 1/2-13 x 4-inch partially threaded hex head cap screw in Grade 9 steel with a corrosion-resistant finish.

Installation Notes

Installation is performed by qualified millwrights, mechanical technicians, or maintenance professionals using standard hex socket or open-end tooling rated for the fastener size. Always verify mating nut or tapped-hole thread class and condition before installation. Follow applicable torque specifications from the equipment OEM or applicable engineering standards rather than general fastener tables. Do not reuse fasteners that have been subjected to yield-load or impact conditions.