Bowmalloy 36010 Hex Head Cap Screw 1/4-20 X 2.5 in Grade 9

Product Description

The BOWMALLOY 36010 is a 1/4-20 partially threaded hex head cap screw measuring 2.5 inches under the head, manufactured from Grade 9 alloy steel with a zinc-plated clear chromate finish. Grade 9 alloy steel delivers higher tensile strength than standard Grade 5 or Grade 8 fasteners, making this screw appropriate for demanding structural and mechanical assemblies. The clear chromate coating provides corrosion resistance in moderate-exposure environments. This fastener is installed by electricians, HVAC technicians, plumbers, and general mechanical contractors wherever a high-strength inch-series hex cap screw is specified.

This screw is suited for use in industrial equipment, HVAC equipment frames, electrical enclosure assemblies, and general mechanical fabrication requiring a high-strength 1/4-20 fastener. The partial threading provides a shank section that resists shear loads, making it preferable over fully threaded screws in applications where bolt shear strength matters alongside clamping load. It follows standard inch-series dimensional conventions and is compatible with 1/4-20 nuts and tapped holes.

Key Features

• Grade 9 alloy steel construction for higher tensile strength compared to standard Grade 5 or Grade 8
• Zinc-plated clear chromate finish for corrosion resistance in moderate-exposure conditions
• Partially threaded shank provides improved shear load resistance
• 1/4-20 UNC thread form follows standard inch-series fastener dimensions
• 2.5 inches length under head accommodates thicker material stacks

Compatibility

Designed as a standard inch-series replacement or service fastener for assemblies requiring a 1/4-20 hex head cap screw with a 2.5-inch grip length in Grade 9 alloy steel.

Installation Notes

Install with a standard hex wrench or socket driver sized for a 1/4-20 hex head cap screw. De-energize and lock out any equipment before replacing or tightening fasteners on electrical enclosures or mechanical assemblies per OSHA lockout/tagout requirements. Do not substitute a lower-grade fastener if Grade 9 is specified, as tensile and proof load ratings differ significantly. Inspect threads and mating tapped holes for damage before installation to ensure full thread engagement.