Bowmalloy 36607 Hex Nut 5/8-11 Grade 9 Steel

Product Description

The BOWMALLOY 36607 is a Grade 9 steel hex nut designed for high-strength fastening applications where standard hardware-grade fasteners are not adequate. Threaded at 5/8-11 with a right-hand thread direction, this nut meets ANSI/ASME B18.2.2 dimensional standards. The clear zinc chromate finish provides corrosion resistance while maintaining a clean appearance. With a hardness rating of 26-36 HRC, this nut is suited for heavy-duty mechanical and structural assemblies. It is typically installed by maintenance technicians, millwrights, or contractors working on high-load bolted joints in industrial, commercial, or heavy-equipment applications.

The 36607 is used in applications requiring elevated clamp load and fatigue resistance beyond what Grade 5 or Grade 8 fasteners provide. Typical install scenarios include structural steel connections, machinery frames, suspension components, and other assemblies subject to vibration or dynamic loading. The 5/8-11 thread size is common in medium-to-large mechanical assemblies across industrial and construction trades.

Key Features

• Grade 9 steel construction for superior tensile and proof load performance over Grade 5 and Grade 8
• 5/8-11 right-hand thread for broad compatibility with standard 5/8-inch fastener systems
• Clear zinc chromate finish provides corrosion resistance in exposed or semi-exposed environments
• 26-36 HRC hardness rating suits high-clamp-load and vibration-prone assemblies
• Meets ANSI/ASME B18.2.2 for dimensional accuracy and interchangeability
• 15/16-inch width across flats fits standard SAE hex tooling

Compatibility

Designed as an OEM-style replacement or standard-stock hex nut for any 5/8-11 threaded fastener application requiring Grade 9 steel hardware per ANSI/ASME B18.2.2.

Installation Notes

Installation should be performed by a qualified mechanic, millwright, or tradesperson familiar with high-strength fastener torque requirements. Always derate or de-energize machinery before disassembling bolted joints. Use calibrated torque tooling appropriate for Grade 9 fastener specifications and consult applicable engineering documentation for required clamp load values. Do not substitute Grade 9 hardware in joints designed for lower-grade fasteners without engineering review.