Value Collection R63084969 Heavy Hex Nut 7/8-9 Stainless

Product Description

The VALUE COLLECTION R63084969 is a heavy hex nut machined from 18-8 stainless steel and left uncoated for a bright finish. It carries a 7/8-9 UNC thread profile with right-hand threading and measures 1.4375 inches across the flats — the wider flat-to-flat dimension that defines the heavy hex pattern. The 55/64-inch height provides additional bearing surface compared to a standard hex nut, making it suitable for high-load fastening applications. Licensed tradespeople and industrial maintenance technicians install this hardware in structural, mechanical, and process-piping assemblies where corrosion resistance is required.

This heavy hex nut is used in applications where stainless steel fasteners are specified for moisture resistance, mild chemical exposure, or hygienic requirements. Typical installations include plumbing and piping flanges, HVAC equipment mounting, food-service equipment, and general industrial assemblies. The 7/8-9 UNC thread size is common in structural and heavy mechanical work where standard hex nut bearing area is insufficient and a wider, taller nut profile is required by specification or engineering practice.

Key Features

• Heavy hex pattern with 1.4375-inch width across flats provides increased bearing surface versus standard hex
• 18-8 stainless steel construction resists corrosion in wet and mildly corrosive environments
• 7/8-9 UNC right-hand thread for straightforward installation with standard tooling
• Bright uncoated finish — no plating to flake, chip, or interfere with dimensional tolerances
• 55/64-inch height suits high-load and thick-flange clamping applications

Compatibility

Designed for use with 7/8-9 UNC threaded fasteners, bolts, and studs in structural, mechanical, and piping assemblies requiring 18-8 stainless steel hardware.

Installation Notes

Installation is performed by licensed plumbers, pipefitters, millwrights, or qualified maintenance technicians depending on the application. Use a correctly sized open-end or box wrench sized for a 1.4375-inch across-flats heavy hex nut. Verify thread engagement and ensure mating fastener thread class is compatible with the UNC standard before final tightening. Do not mix stainless steel fasteners with dissimilar metals in environments where galvanic corrosion is a concern.