Bowmalloy 36206 Hex Head Cap Screw 7/8-9 X 6.5 in Grade 9

Product Description

The BOWMALLOY 36206 is a Grade 9 alloy steel hex head cap screw designed for high-strength fastening applications where standard hardware-grade fasteners are insufficient. Measuring 7/8-9 thread size with a 6.5-inch length under head, this screw is partially threaded and finished with a clear zinc chromate coating for corrosion resistance. Grade 9 fasteners exceed the tensile requirements of Grade 5 and Grade 8, making this screw suited for demanding structural and mechanical assemblies. It is installed by mechanics, millwrights, and field service technicians working on heavy equipment, industrial machinery, and structural connections.

This cap screw is commonly used in heavy-duty industrial and construction applications where large-diameter, high-strength fasteners are required. Typical install scenarios include equipment frames, structural steel connections, hydraulic component mounting, and machinery base plates. The 7/8-9 coarse thread pattern provides strong clamping force and is compatible with standard 7/8-9 threaded nuts and tapped holes per Unified National Coarse (UNC) standards. Sold in packages of 5.

Key Features

• Grade 9 alloy steel construction for high tensile and proof load strength
• 7/8-9 UNC coarse thread for broad tooling and hardware compatibility
• Partially threaded shank for improved shear strength in structural connections
• Clear zinc chromate finish provides corrosion and oxidation resistance
• 6.5-inch length under head suits deep-stack or thick-flange applications

Compatibility

Designed as a high-strength replacement for 7/8-9 UNC hex head cap screws in industrial and heavy equipment applications requiring Grade 9 alloy steel fasteners.

Installation Notes

Installation is typically performed by mechanics or millwrights using standard hex wrenches or impact tooling sized for 7/8-9 fasteners. Always verify that mating threads and tapped holes conform to UNC 7/8-9 specifications before installation. Inspect fastener and mating surfaces for damage or contamination prior to assembly. Follow the equipment manufacturer's torque sequence and fastener preload specifications for the specific application.