Bowmalloy 36008 Hex Head Cap Screw 1/4-20 X 2 in Grade 9

Product Description

The BOWMALLOY 36008 is a 1/4-20 partially threaded hex head cap screw machined from Grade 9 alloy steel and finished with a clear zinc chromate coating. At 2 inches under the head, this fastener delivers the clamping strength and corrosion resistance required for demanding mechanical, structural, and equipment assembly applications. Grade 9 alloy steel exceeds the tensile requirements of standard Grade 5 and Grade 8 hardware, making it a preferred choice where vibration resistance and joint integrity are critical. Licensed tradespeople and maintenance professionals working in HVAC, electrical, and industrial service applications routinely specify this grade for high-stress bolted connections.

This fastener is suited for inch-system assemblies requiring a 1/4-20 UNC thread pattern. The partial threading preserves shank bearing area, which improves shear resistance in close-tolerance holes. The clear zinc chromate finish provides baseline corrosion protection for indoor and sheltered outdoor environments. Typical applications include equipment panel mounting, bracket attachment, and structural fastening in mechanical rooms, rooftop units, and light industrial equipment.

Key Features

• Grade 9 alloy steel construction for elevated tensile and proof load ratings versus Grade 5 or Grade 8
• 1/4-20 UNC thread size in the inch measurement system
• 2-inch length under head for extended grip in thicker assemblies
• Partially threaded shank improves shear load performance in fitted holes
• Clear zinc chromate finish delivers corrosion resistance in sheltered environments
• Hex head drive compatible with standard hex sockets and wrenches

Compatibility

Designed as a standard 1/4-20 UNC hex head cap screw for use in any inch-system application requiring Grade 9 alloy steel fasteners with a 2-inch grip length.

Installation Notes

Installation is performed by qualified mechanical or maintenance tradespeople using standard hex sockets or combination wrenches. Always confirm the mating thread is clean and free of debris before installation. Torque to the value specified in the equipment manufacturer's fastener schedule for Grade 9 hardware at this diameter. Do not mix grade designations in the same joint without engineering approval.