Bowmalloy BOW36215 Hex Head Cap Screw Grade 9 1-8x2.5in

Product Description

The BOWMALLOY BOW36215 is a fully threaded hex head cap screw sized at 1-8 thread by 2.5 inches under the head, manufactured from Grade 9 steel with a Bowma-Guard zinc-plated clear chromate finish. Grade 9 is a high-strength fastener grade that exceeds the tensile requirements of the more common Grade 5 and Grade 8, making this screw well suited for heavy-duty structural and mechanical assemblies. The zinc-plated clear chromate coating provides a base level of corrosion resistance for indoor and light outdoor applications. This fastener is sold in packages of 10 and is sized in the inch measurement system.

This cap screw is used in industrial, commercial, and trade applications where a high-strength inch-series fastener is required. Typical installation scenarios include mounting heavy equipment, securing structural frames, and anchoring machinery components. Because the screw is fully threaded, it engages the full length of the mating nut or tapped hole, which is useful when maximum thread engagement is needed over the full 2.5-inch grip length. HVAC equipment techs, millwrights, pipefitters, and general mechanical contractors commonly use Grade 9 hex cap screws in high-load bolted joints.

Key Features

• Grade 9 steel construction for high tensile strength beyond Grade 8 requirements
• Fully threaded along the 2.5-inch length under head for maximum thread engagement
• Bowma-Guard zinc-plated clear chromate finish for corrosion resistance
• Inch series sizing: 1-8 thread designation
• Packaged in quantities of 10 per unit

Compatibility

Designed as a standard inch-series hex head cap screw for use with 1-8 UNC threaded nuts, tapped holes, or flanged connections requiring a Grade 9 high-strength fastener.

Installation Notes

Installation should follow applicable torque specifications from a recognized fastener standard such as ASME or SAE for Grade 9 inch-series bolts. Use a standard hex socket or open-end wrench sized for the 1-inch hex head. Ensure the mating thread or nut is also rated for the applied load before final assembly. De-energize and lock out any equipment before replacing or installing fasteners in mechanical assemblies per applicable OSHA lockout-tagout procedures.