ASME B18.2.2 Gr.2 Hex Nut Carbon Steel Zinc Plated

Product Snapshot

A staple stocking fastener widely favored across North American hardware markets, ASME B18.2.2 Gr.2 Hex Nut Carbon Steel Zinc Plated is precision manufactured from qualified low carbon steel in strict accordance with ASME B18.2.2 and SAE J995 Grade 2 specifications. Optimized for UNC coarse thread mating assemblies, it delivers economical, consistent and dependable holding performance for static and light-load fastening applications. It serves as the perfectly matched nut option to pair with standard ASTM A307 hex bolts for general inch-series fastening jobs.

Key Selling Points

- Compliant with ASME B18.2.2 and SAE J995 Grade 2 specifications for inch UNC coarse threads

- Precision tapped threads for smooth, consistent thread engagement and low assembly friction

- Standard hex profile compatible with open-end wrenches, socket tools and impact drivers

- Grade 2 nuts do not require marking on the hex flats by standard requirement

- Full range of inch sizes available to cover most common A307 bolt dimensions

For distributors looking to expand their inch fastener inventory, ASME B18.2.2 Gr.2 Hex Nut Carbon Steel Zinc Plated is a reliable pick that covers countless routine assembly and maintenance jobs with stable cost control.

Core Specification Table

Item	Details
Applicable Standard	ASME B18.2.2, SAE J995
Performance Grade	Grade 2
Base Material	Low Carbon Steel (Not Stainless Steel)
Thread Type	UNC Coarse Thread
Standard Stock Finish	Bright Zinc Plated
Recommended Mating Fastener	ASTM A307 Hex Bolt

Coating selection directly determines how well the nut resists rust and which working environments it suits. The comparison photo shows three popular coated variants for your reference. Beyond these plated options, we also supply plain unfinished blanks, perfect if your workshop plans to paint or apply custom coatings on your own.

Surface Finish Reference

Finish	Rust Resistance	Suitable Application
Bright Zinc Plated	Moderate	Indoor, covered outdoor racks, machinery and fencing
Yellow Zinc Plated	Good	Sheltered outdoor locations, longer rust protection than bright zinc
Black Oxide	Low	Dry indoor workshop, temporary non-critical connections
Plain / Unfinished	None	For customers conducting their own coating or treatment

Typical Usage Scenarios

Fabricators, fencing contractors, farm equipment workshops and hardware retailers widely select this general-purpose carbon steel hex nut. It is commonly adopted for timber fencing frames, storage rack assembly, handrail secondary fixing and temporary bracing structures.

This Grade 2 nut is engineered exclusively for static load conditions. Any connections exposed to continuous heavy shock or cyclic vibration need higher strength fasteners like Grade 8 nuts for reliable performance.

Production & Batch Inspection

We source qualified low carbon steel bar stock as raw material. Each production batch goes through thread tapping, cleaning and surface treatment. Our QC team carries out random sampling inspection, including thread go/no-go gauge check, across-flats dimension verification and coating adhesion test. Batch records are retained for traceability.

When you place bulk orders of ASME B18.2.2 Gr.2 Hex Nut Carbon Steel Zinc Plated, every shipment is inspected to keep consistent dimensions from batch to batch.

Practical Notes for Installation

- Suitable only for static and light-load fastening scenarios

- Not for impact loads or safety-critical structural connections

- Confirm UNC coarse thread before matching with bolts

- Controlled coating thickness ensures smooth thread assembly

- Do not over-tighten to protect threads from damage

- Store in dry areas to slow down surface rusting

Packing & Shipment

We support flexible packing options to suit different business demands. Bulk keg packing is available for hardware distributors who handle regular inventory restocking. Standard export carton packing works well for small project orders and mixed-size batches. For large-volume shipments, we arrange palletized packing with stretch wrapping to stabilize the whole load during ocean or land transit. We apply foam and separators inside packages to shield threads against scratches and deformation. Custom printed labels with part number, grade, finish and quantity information can be produced to fit your internal warehouse management system.

FAQ

Q: Can Grade 2 nuts pair with Grade 5 bolts?

A: Threads can engage physically, but we do not recommend mixing grades on critical connections. Matched grade combinations provide safer performance.

Q: What is the difference between bright zinc and yellow zinc?

A: Yellow zinc plating delivers better rust resistance than bright zinc; bright zinc is our standard stock option.

Q: Can I buy these nuts without any surface finish?

A: Yes, plain unfinished nuts are available. They offer zero rust protection and are intended for customers with their own coating processes.

Q: Is repeated disassembly and reuse allowed?

A: Limited reuse is acceptable for non-critical static joints. Reuse after heavy torque tightening is not suggested.