Bowmalloy 36129 Hex Head Cap Screw 9/16-12 X 1 in Grade 9

Product Description

The BOWMALLOY 36129 is a Grade 9 alloy steel hex head cap screw designed for high-strength fastening applications in industrial, mechanical, and trade assembly work. Sized at 9/16-12 thread with a 1-inch length under the head, this fully threaded fastener delivers the clamping force and tensile strength required in demanding structural and equipment-mounting applications. The zinc-plated clear chromate finish provides a baseline level of corrosion resistance suitable for general indoor and light-duty outdoor use. Torque-critical joints in heavy equipment, HVAC curb mounting, pump bases, and similar assemblies are common uses for this screw grade and size.

Grade 9 alloy steel cap screws are used across mechanical contracting, heavy equipment service, and industrial maintenance applications where standard Grade 5 or Grade 8 fasteners do not meet load requirements. This 9/16-12 x 1-inch configuration is a common size in OEM equipment assembly and field repair work on structural brackets, motor mounts, pump flanges, and similar connections requiring high-strength inch-series fasteners. Sold individually with a package quantity of 25 units per package.

Key Features

• Grade 9 alloy steel construction for high tensile and proof-load strength
• 9/16-12 UNC thread, fully threaded for maximum thread engagement over the 1-inch length
• Zinc-plated clear chromate finish for corrosion resistance in general service environments
• Hex head drive for use with standard sockets or wrenches
• Inch measurement system, UNSPSC Code 31161501
• Package quantity of 25 fasteners per pack

Compatibility

Designed as a high-strength inch-series hex head cap screw for use in any application requiring a 9/16-12 UNC fully threaded fastener with Grade 9 alloy steel strength ratings.

Installation Notes

Installation should be performed by a qualified mechanic, millwright, or trade professional familiar with high-strength fastener torque requirements for Grade 9 hardware. Always consult the equipment manufacturer's torque specifications before final tightening, and use a calibrated torque wrench to avoid over- or under-torquing. Clean mating threads and inspect for damage before assembly. Do not substitute a lower-grade fastener in applications where Grade 9 strength is specified.