Bowmalloy 36141 Hex Head Cap Screw 9/16-12 X 4 in Grade 9

Product Description

The BOWMALLOY 36141 is a Grade 9 alloy steel hex head cap screw sized 9/16-12 x 4 inches with a zinc-plated clear chromate finish. Grade 9 fasteners are among the highest-strength inch-series screws available, making this cap screw suited for heavy-duty mechanical and structural assemblies where joint integrity under high load and vibration is critical. The partial threading provides a smooth shank section for shear loading applications. The zinc clear chromate coating provides baseline corrosion resistance in indoor and moderately protected environments. This fastener is installed by mechanical contractors, millwrights, equipment installers, and general tradespeople working on heavy machinery, HVAC equipment frames, and structural steel assemblies.

The BOWMALLOY 36141 is appropriate for bolted connections in industrial equipment, commercial HVAC structural frames, and mechanical systems requiring high-tensile fasteners. The 9/16-12 coarse thread pattern is compatible with standard inch-series nuts and tapped holes of the same designation. Partial threading allows the shank to bear shear loads while the threaded section handles clamping force. This screw is sold in packages of 10 units per the supplier packaging designation.

Key Features

• Grade 9 alloy steel construction for high tensile and proof load capacity
• 9/16-12 coarse thread for compatibility with standard inch-series hardware
• 4-inch length under head suits deep-reach bolted joint applications
• Partially threaded shank provides shear load capability alongside clamping strength
• Zinc-plated clear chromate finish offers corrosion resistance in protected environments
• Packaged in quantities of 10 for job-site convenience

Compatibility

Designed for use with standard inch-series 9/16-12 hex nuts, flat washers, and tapped holes conforming to ASME B18.2.1 hex cap screw standards in mechanical and structural assemblies.

Installation Notes

Installation should be performed by qualified mechanical tradespeople following applicable torque specifications for Grade 9 fasteners as published in ASME or fastener manufacturer tables. De-energize and lock out any equipment before accessing fastened assemblies per OSHA lockout/tagout requirements. Use a calibrated torque wrench to achieve proper clamp load without over-torquing the joint. Inspect threads and mating hardware for damage or contamination before installation.