Value Collection 31215 Hex Nut 1/2-20 Grade 5 Zinc

Product Description

The VALUE COLLECTION 31215 is a 1/2-20 hex nut manufactured from SAE J995 Grade 5 steel with a zinc-plated finish for corrosion resistance. It features right-hand threading conforming to the UN thread standard and meets ANSI/ASME B18.2.2 dimensional requirements. Measuring 0.75 inches across flats and 0.4375 inches in height, this nut is sized for use with 1/2-inch fine-thread fastener assemblies. Hardness is rated at Rockwell C32. Plumbers, HVAC technicians, electricians, and general trade professionals use this type of fastener in mechanical assemblies, equipment mounting, and structural connections requiring a reliable threaded joint.

This hex nut is suited for residential and commercial trade applications where 1/2-20 fine-thread fastening is required. It is commonly used in equipment installations, mechanical supports, pipe hanger assemblies, and other structural connections where a zinc-plated steel nut provides adequate corrosion protection in non-extreme environments. The fine thread pitch offers tighter thread engagement compared to coarse-thread equivalents, which can be advantageous in vibration-prone applications or when precise torque control is needed.

Key Features

• 1/2-20 fine-thread specification with right-hand thread direction
• SAE J995 Grade 5 steel construction with Rockwell C32 hardness rating
• Zinc-plated finish for general-duty corrosion resistance
• Meets ANSI/ASME B18.2.2 fastener dimensional standard
• 0.75 inches across flats — fits standard 3/4-inch hex wrench or socket
• UN thread standard for compatibility with unified national thread fasteners

Compatibility

Designed for use with 1/2-20 fine-thread bolts and threaded rod conforming to the UN thread standard. Suitable for general mechanical and trade assembly applications where SAE J995 Grade 5 steel hardware is specified.

Installation Notes

Installation is performed by hand-threading onto a mating 1/2-20 bolt or stud, then tightening with a 3/4-inch open-end wrench, combination wrench, or socket. Ensure mating threads are clean and free of debris before assembly. Do not mix thread standards or pitch — confirm the mating fastener is also 1/2-20 UN before installation. Follow applicable mechanical codes and torque specifications outlined in your project drawings or equipment manufacturer documentation.