Value Collection MSC-72047681 Hex Nut 1-8 Unc A563 Dh

Product Description

The VALUE COLLECTION MSC-72047681 is a heavy-hex-style nut threaded to a 1-8 UNC specification and manufactured from A563 Grade DH steel with a hot-dipped galvanized finish. Grade DH designates a high-proof-load, heavy-duty nut intended for structural and high-tension fastening applications. The hot-dipped galvanized coating provides a thick, metallurgically bonded zinc layer that resists corrosion in outdoor, wet, and chemical-exposure environments. Width across flats measures 1.625 inches, and height measures 63/64 inches. The right-hand thread direction conforms to standard UNC fastener practice. This nut is installed by ironworkers, structural trades, plumbers, and millwrights working on bolted connections that require dependable clamp load under load cycling or environmental exposure.

This nut is suited for structural steel assemblies, heavy equipment mounting, pipeline flanges, utility infrastructure, and any application where a large-diameter UNC fastener with corrosion protection is required. The 1-8 thread size is common in structural bolting governed by AISC and RCSC specifications. The A563 Grade DH designation satisfies the proof-load and hardness requirements called out in those standards. It is appropriate for both indoor and outdoor installations, including coastal and industrial environments where bare or lightly coated fasteners would corrode prematurely.

Key Features

• A563 Grade DH steel provides high proof load and hardness suitable for structural bolted connections
• Hot-dipped galvanized finish delivers a thick zinc coating for corrosion resistance in outdoor and wet environments
• 1-8 UNC thread conforms to standard Unified National Coarse fastener practice
• Right-hand thread direction for use with standard UNC bolts and threaded rod
• Width across flats of 1.625 inches accommodates standard heavy-hex wrench and socket tooling

Compatibility

Designed as an OEM-style replacement and general-use hex nut for structural and industrial fastening applications requiring a 1-8 UNC thread size with A563 Grade DH material certification and hot-dipped galvanized corrosion protection.

Installation Notes

Installation should be performed by qualified tradespeople following applicable structural or mechanical codes, including AISC, RCSC, or ASME B18 standards as relevant to the application. Power down or de-energize any associated equipment before servicing fastened assemblies. Use a calibrated torque wrench or tension-control method appropriate to the joint specification. Do not mix galvanized and non-galvanized fastener components in the same joint without reviewing galvanic compatibility.