Value Collection MP31217 Hex Nut 5/8-18 Grade 5 Zinc

Product Description

The VALUE COLLECTION MP31217 is a 5/8-18 UNF hex nut manufactured from SAE J995 Grade 5 steel with a zinc-plated finish. It features a right-hand thread and meets the ANSI ASME B18.2.2 fastener standard. The nut measures 15/16 inches across flats and 35/64 inches in height, making it a standard-geometry hex nut suited for medium-strength bolted assemblies. With a Rockwell C32 hardness rating, this nut provides reliable clamping force in applications where Grade 5 strength is specified. Plumbers, HVAC technicians, electricians, and general trade professionals use this fastener when assembling or securing equipment, brackets, and mechanical components.

This hex nut is appropriate for residential and commercial trade applications where a fine-thread 5/8-18 UNF fastener is required. Common install scenarios include securing HVAC equipment mounting hardware, plumbing fixture assemblies, electrical panel brackets, and general mechanical equipment. The zinc-plated finish provides a basic level of corrosion resistance suitable for indoor and moderately protected environments. It is sold individually with a minimum order quantity of 25 units.

Key Features

• 5/8-18 UNF right-hand thread for fine-thread bolted connections
• SAE J995 Grade 5 steel construction with Rockwell C32 hardness
• Zinc-plated finish for basic corrosion resistance
• 15/16 inches across flats for standard hex wrench or socket fitment
• Meets ANSI ASME B18.2.2 fastener dimensional standard
• Minimum order quantity of 25 units per order

Compatibility

Designed as a standard-geometry replacement or stocking hex nut for any 5/8-18 UNF fine-thread bolt or threaded stud where SAE J995 Grade 5 strength and ANSI ASME B18.2.2 dimensional compliance are required.

Installation Notes

Installation is performed by any trade professional working with 5/8-18 UNF threaded fasteners. Use a 15/16-inch open-end wrench, box wrench, or socket to drive the nut. De-energize or shut off any systems before working on fastened assemblies to prevent movement or contact with live components. Do not mix Grade 5 nuts with higher-grade hardware in critical structural joints without verifying compatibility with the applicable mechanical or structural code.