Bowmalloy BOW36337 Hex Cap Screw 5/16-24 3in Grade 9

Product Description

The BOWMALLOY BOW36337 is a Grade 9 steel hex head cap screw sized at 5/16-24 x 3 inches with partial threading and a Bowma-Guard zinc-plated clear chromate finish. Grade 9 fasteners deliver high tensile strength, making this screw well-suited for heavy-duty mechanical assemblies where standard Grade 5 or Grade 8 hardware would be marginal. The Bowma-Guard coating provides corrosion resistance for exposed or semi-exposed installations. Partial threading under the head allows for precise clamping force and is preferred in many structural and mechanical joint applications. Licensed tradespeople and assembly technicians working on HVAC frames, electrical enclosures, mechanical supports, and plumbing equipment brackets commonly use fasteners of this specification.

This fastener is used across a wide range of trade applications including HVAC equipment mounting, mechanical room installations, panel fabrication, and general structural assembly work. The 5/16-24 fine-thread configuration offers improved resistance to loosening under vibration compared to coarse-thread equivalents, making it a common choice for mechanical and equipment-mounting contexts where joint integrity over time matters. The 3-inch length under head accommodates moderate stack thickness in multi-layer assemblies. This part is sold individually with a package quantity of 50 units per pack.

Key Features

• Grade 9 steel construction for high tensile strength in demanding mechanical joints
• 5/16-24 fine-thread profile reduces loosening under vibration
• 3-inch length under head suits moderate-depth assemblies and multi-layer stack-ups
• Partial threading provides precise clamping and load distribution at the joint face
• Bowma-Guard zinc-plated clear chromate finish delivers corrosion resistance
• Package quantity of 50 units supports job-lot purchasing and stocking

Compatibility

Designed as a standard inch-series hex head cap screw for use in any application requiring a 5/16-24 fine-thread fastener with a 3-inch grip length and Grade 9 tensile rating.

Installation Notes

Installation should be performed by a qualified mechanic or trade professional familiar with fastener torque standards for Grade 9 hardware. Always use a calibrated torque wrench and consult the applicable equipment manufacturer specifications or ASME B18.2.1 guidelines for proper seating torque. Inspect threads on mating hardware before assembly to ensure compatibility with the 5/16-24 fine-thread pitch. Do not substitute a coarse-thread nut or tapped hole, as cross-threading will damage both the fastener and the mating component.