Bowmalloy 36149 Hex Head Cap Screw 5/8-11 X 2 in Grade 9

Product Description

The BOWMALLOY 36149 is a Grade 9 alloy steel hex head cap screw designed for high-strength fastening applications across industrial, construction, and mechanical assembly work. Measuring 5/8-11 thread size at 2 inches in length under the head, this partially threaded fastener delivers the clamping force and tensile strength that demanding structural and equipment-mounting jobs require. The clear zinc chromate finish provides corrosion resistance for use in exposed or moderately harsh environments. Installed using standard hex tooling, this screw is a go-to choice for millwrights, pipefitters, ironworkers, and general contractors who need a reliable, high-grade fastener.

This cap screw is suited for heavy equipment assembly, structural steel connections, machinery mounting, and similar high-load fastening scenarios. The 5/8-11 coarse thread pattern is a common inch-series size found throughout industrial and commercial mechanical applications. Partial threading provides a smooth shank section for precise fit in close-tolerance bored holes, which is especially useful in flanged joints and bolted connections where shear load is a factor.

Key Features

• Grade 9 alloy steel construction delivers higher tensile and proof load ratings compared to Grade 5 or Grade 8 fasteners
• 5/8-11 coarse inch thread for broad tool and nut compatibility
• 2-inch length under head fits a wide range of standard bolted joint stack-ups
• Partial threading preserves a smooth shank for shear-load and close-tolerance applications
• Clear zinc chromate finish adds corrosion resistance without significant dimensional impact

Compatibility

Designed as a standard inch-series hex head cap screw for use with 5/8-11 nuts, washers, and tapped holes in structural, industrial, and mechanical assembly applications.

Installation Notes

Installation is performed using a standard hex wrench, impact driver, or torque wrench with the appropriate 5/8-inch hex socket. Power down or de-energize any equipment before fastening work begins in live mechanical or electrical assemblies. Follow applicable torque specifications from the equipment manufacturer or relevant industry standards for Grade 9 fasteners. Inspect threads and mating surfaces for damage or contamination before assembly to ensure full clamping load is achieved.