Bowmalloy 36113 Hex Head Cap Screw 1/2-13 X 3-1/4 in Grade 9

Product Description

The BOWMALLOY 36113 is a Grade 9 alloy steel hex head cap screw sized at 1/2-13 x 3-1/4 inches, finished with a zinc-plated clear chromate coating for corrosion resistance. It features partial threading and is manufactured to inch-system dimensions. This fastener is designed for high-strength bolted connections where Grade 9 load ratings are required. HVAC, mechanical, and plumbing contractors use heavy-duty hex cap screws like this one when securing equipment bases, structural brackets, and pipe support assemblies in demanding service environments.

The 36113 is suited for industrial and commercial applications where a high-strength, partially threaded hex fastener is needed. Its 1/2-13 coarse thread pitch and 3-1/4 inch length under head make it a common choice for through-bolting thick material sections, equipment mounting flanges, and structural steel connections encountered in mechanical trades work.

Key Features

• Grade 9 alloy steel construction for high tensile strength requirements
• Partial threading allows for greater clamping force on unthreaded shank section
• Zinc-plated clear chromate finish provides baseline corrosion protection
• 1/2-13 coarse thread pitch in standard inch measurement system
• 3-1/4 inch length under head suits thick-section bolted connections

Compatibility

Designed as a high-strength hex head cap screw for general mechanical, HVAC, and structural applications requiring a 1/2-13 x 3-1/4 inch Grade 9 fastener in inch-system hardware.

Installation Notes

Installation is performed by mechanical and general trade technicians using standard hex wrenches or impact drivers with the appropriate socket. Always ensure mating threads and hole diameters match the 1/2-13 specification before installation. Follow applicable building and mechanical codes for minimum fastener grade and spacing requirements. Inspect threads for damage before use and do not install fasteners that show signs of deformation or corrosion on load-bearing surfaces.