Gibraltar 41603G Flange Nut 3/8-16 7/8 Inch Black Oxide

Product Description

The GIBRALTAR 41603G is a 3/8-16 threaded flange nut manufactured from Grade 12L14 steel with a black oxide finish. The integrated flange distributes clamping load over a wider bearing surface, reducing the need for a separate washer in many fastening applications. Standing 1/2 inch high with a flange diameter of 7/8 inch, a flange height of 1/8 inch, and a width across flats of 11/16 inch, this nut meets TCMAI fastener standards. It is well suited for use in mechanical assemblies, HVAC equipment mounting, electrical enclosures, and general trade applications where a compact, corrosion-resistant fastener is required.

This flange nut is used across residential and light commercial trade work wherever a 3/8-16 threaded fastener with a built-in bearing flange is specified. Typical applications include securing equipment panels, mounting brackets, and structural components in HVAC, plumbing, and electrical installations. The black oxide finish provides mild corrosion resistance suitable for indoor and protected outdoor environments. Sold individually, with a minimum order quantity of 10 units per order.

Key Features

• 3/8-16 thread size for compatibility with standard inch-series fastener systems
• Integrated 7/8 inch diameter flange distributes load without a separate washer
• Grade 12L14 steel construction provides consistent machinability and strength
• Black oxide finish offers mild corrosion resistance and reduces light reflection
• Meets TCMAI fastener standards
• Compact profile at 1/2 inch overall height for use in tight clearance installations

Compatibility

Designed as a standard inch-series flange nut for use with 3/8-16 threaded fasteners in mechanical, HVAC, plumbing, and electrical trade assemblies.

Installation Notes

Installation is performed by hand and standard hex tools using a 11/16 inch wrench or socket. Power down or de-energize any equipment before accessing fastener points on electrical or HVAC components. Do not overtighten, as Grade 12L14 steel is optimized for machinability rather than maximum tensile strength. Follow applicable mechanical and structural codes for torque requirements specific to the assembly being serviced.