Value Collection HNI8225-001BX Hex Nut Grade 8 Steel Unc

Product Description

The VALUE COLLECTION HNI8225-001BX is a heavy-duty hex nut machined from Grade 8 steel with a bright, uncoated finish. It carries a 2-1/4-4-1/2 UNC thread and is suited for high-strength fastening applications where structural integrity is a priority. The nut measures 3.375 inches across the flats and stands 1-15/16 inches tall, making it appropriate for large-diameter bolted connections in industrial, mechanical, and structural assemblies. At 3.17 pounds, it is a substantial fastener designed for heavy clamping loads. Licensed trades and maintenance professionals working with heavy equipment, structural steel, or large mechanical assemblies will encounter this size regularly.

This hex nut is used in applications requiring a coarse UNC thread engagement on 2-1/4-inch fasteners. Typical installations include heavy equipment frames, industrial machinery, structural steel connections, and large-bore mechanical assemblies. The right-hand thread direction conforms to standard tightening convention. The uncoated bright finish is suitable for indoor or protected environments where additional corrosion resistance is not required.

Key Features

• Grade 8 steel construction for high tensile and proof-load strength
• 2-1/4-4-1/2 UNC thread for coarse-pitch engagement on large-diameter fasteners
• 3.375 inches across flats for use with standard heavy-duty wrenching tools
• Right-hand thread direction per standard convention
• Bright uncoated finish suited for protected or indoor installations
• Does not meet military specifications - intended for commercial and industrial use

Compatibility

Designed as a standard replacement or new-installation hex nut for 2-1/4-4-1/2 UNC bolts in commercial, industrial, and structural applications requiring Grade 8 steel fastener strength.

Installation Notes

Installation is typically performed by millwrights, ironworkers, or mechanical maintenance technicians using appropriately rated wrenches or impact tooling sized for a 3.375-inch hex. Always verify that the mating bolt meets or exceeds Grade 8 specifications to maintain the rated clamping load. De-energize or lock out any equipment before servicing fastened assemblies per applicable OSHA lockout/tagout procedures. Do not mix metric and UNC fastener standards in the same joint.