Bowmalloy 36143 Hex Head Cap Screw 9/16-12 X 5 in Grade 9

Product Description

The BOWMALLOY 36143 is a Grade 9 alloy steel hex head cap screw designed for high-strength fastening applications where standard hardware-grade fasteners are not sufficient. It measures 9/16-12 thread size with a 5-inch length under the head and features partial threading. The zinc-plated clear chromate finish provides corrosion resistance for use in exposed or moderately harsh environments. This fastener is installed by millwrights, mechanical contractors, equipment technicians, and maintenance professionals who require reliable clamping force in structural and industrial assemblies.

Grade 9 hex head cap screws are used in heavy equipment, agricultural machinery, industrial frames, and structural fastening applications where elevated tensile and proof load ratings are required. The 9/16-12 coarse thread pattern seats well in standard tapped holes and nuts of matching specification. Partial threading allows for shank engagement in through-bolt and clearance-hole applications, making this screw suitable for joints that benefit from an unthreaded bearing surface in the grip zone.

Key Features

• Grade 9 alloy steel construction for high tensile strength fastening
• 9/16-12 coarse thread compatible with standard inch-series nuts and tapped holes
• 5-inch length under head accommodates thick structural members and stacked assemblies
• Partial threading provides a shank bearing surface in clearance-hole applications
• Zinc-plated clear chromate finish offers corrosion resistance in moderate-exposure environments
• Inch measurement system for compatibility with standard US fastener tooling and hardware

Compatibility

Designed as an OEM-style replacement or direct-use fastener for applications requiring a 9/16-12 inch-series hex head cap screw with Grade 9 alloy steel strength ratings.

Installation Notes

Installation should be performed by qualified mechanical or maintenance personnel using a properly sized hex socket or open-end wrench for the 9/16-12 thread pattern. Always verify that the mating nut or tapped hole matches the 9/16-12 thread specification before installation. Apply appropriate thread lubricant or anti-seize compound per the equipment manufacturer's requirements. Refer to applicable torque specifications from the equipment OEM or a recognized fastener standard, as no torque value is provided with this product listing.