Name: ASME B18.2.2 Blue Wax ASTM A194 Gr 2H Heavy Hex Nut | Anti-Galling Coated
Brand: Ningbo Yokelink Machinery Co.,Limited
SKU: OEM
Price: 2.00 USD
Availability: InStock

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ASME B18.2.2 Blue Wax ASTM A194 Gr 2H Heavy Hex Nut | Anti-Galling Coated

Product Details:

Place of Origin:	China
Brand Name:	Yokelink
Model Number:	OEM

Payment & Shipping Terms:

Minimum Order Quantity:	1000pcs
Price:	$1.0-$3.0
Packaging Details:	Carton & Pallet
Delivery Time:	35-40days
Payment Terms:	L/C, T/T
Supply Ability:	10000pcs per month

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Detailed Product Description

Product Category:	Industrial Fasteners / Heavy Hex Nuts	Manufacturing Standard:	ASTM A194 / A194M Grade 2H
Dimensional Standard:	ASME B18.2.2 (Heavy Hex Profile)	Surface Coating:	Blue Wax (Dry Film Lubricant)
Material & Heat Treatment:	Medium Carbon Steel (Quenched & Tempered)	Thread Profiles:	UNC / 8-UN Class 2B Fit

Blue Wax ASTM A194 Gr 2H Heavy Hex Nut | Anti-Galling Coated

Yokelink Blue Wax Coated ASTM A194 Grade 2H Heavy Hex Nuts are engineered for high-pressure, high-temperature, and structural heavy-duty bolting assemblies. Manufactured from heat-treated carbon steel and finished with an engineered blue wax dry-film lubricant coating, these nuts deliver consistent torque-tension relationships and prevent thread galling during rapid pneumatic and hydraulic tightening.

ASTM A194 Grade 2H Mechanical Integrity:Quenched and tempered to meet the rigorous mechanical requirements of ASTM A194 / A194M Grade 2H, these nuts feature a Rockwell hardness rating of 24 to 35 HRC and a minimum proof load stress of 175,000 psi. They are the global standard for pairing with ASTM A193 Grade B7 studs and heavy structural bolts in flange connections, utility infrastructure, and petrochemical piping.

Anti-Seize Blue Wax Lubricant Coating:The specialized blue wax formulation acts as a high-efficiency dry lubricant. It significantly lowers the friction coefficient ($k$-factor), reducing required installation torque, preventing high-speed friction lockup (galling/seizing), and ensuring uniform clamping pre-load across entire multi-bolt flange faces.

Key Technical Features of Blue Wax Coated ASTM A194 Grade 2H Heavy Hex Nuts:

Certified Standard: Fully compliant with ASTM A194 / A194M Grade 2H specifications.

Engineered Blue Wax: Provides superior thread lubrication and anti-galling protection during high-speed torqueing.

Heavy Hex Dimensions: Conforms to ASME B18.2.2 standards for maximum wrench contact area.

Heat Treated: Quenched and tempered medium carbon steel for high proof load resistance.

Mating Compatibility: Perfectly matched for ASTM A193 B7, ASTM A325, and high-strength threaded studs.

Production Process of Blue Wax Coated ASTM A194 Grade 2H Heavy Hex Nuts

Raw medium‑carbon steel bar stock is inspected for chemical composition and heat lot traceability before being cut into blanks, which are formed into heavy hex nut blanks by cold or hot forging according to nut size. The blanks go through tapping to create standard internal threads, followed by quenching and tempering heat treatment to meet ASTM A194 Grade 2H mechanical and hardness requirements. After heat‑treatment, parts are cleaned and deburred, then marked with grade and manufacturer identifiers. The nuts are then subjected to dimensional check, thread gauge verification and hardness testing, qualified products proceed to blue‑wax coating application for thread lubrication and temporary anti‑rust protection, and final visual inspection is performed before packing for shipment.

Why Are Some Hex Nuts Blue in Color?

It is often asked why some high strength hex nuts that are supplied with high strength bolts appear to be blue or some other color. This is normally the case with galvanized, high strength, heavy hex nuts and the reason for this is because of the wax lubricant applied to the nuts. According to the ASTM A563 specification, “Hot-dip and mechanically deposited zinc-coated Grade DH nuts shall be provided with an additional lubricant which shall be clean to the touch”.

The dye color is so that the presence of the lubricant is obvious and recognizable. Supplementary Requirement S2 under ASTM A563 specifies that the lubricant shall have a contrasting color to make its presence obvious, however it is not required unless specified. Since the A563 specification only requires an additional lubricant for galvanized DH nuts, Supplementary Requirement S1 can be specified, which requires that the nuts shall be provided with an additional lubricant regardless of the finish.

When lubricated A563DH nuts are supplied, they will typically possess a contrasting color, most often blue, regardless of whether or not the supplementary requirement, S2, has been specified. This makes the lubrication easy to recognize and alleviates any potential confusion. Another thing to keep in mind is that ASTM A194 2H nuts may also come with a dyed lubricated coating. The reason for this is because the ASTM A563 specification allows for A194 2H nuts as an acceptable substitute for A563DH.

Yokelink Quality Control and Testing Equipments:

We don't just reference standards; we also verify them in practice: each batch of products undergoes destructive tensile testing in our internal laboratory to ensure load performance exceeds the minimum requirements of IEEE C135.2 or CSA C83 specification; we use optical comparators to ensure the geometric accuracy of chamfered tips and rolled threads, enabling convenient on-site installation; at the same time, we conduct comprehensive testing on Rockwell hardness, coating thickness, and other parameters, and each shipment is accompanied by the original manufacturer's material specifications (MTRs) and quality inspection reports, with all data traceable back to the raw material furnace number.

Application of Blue Wax Coated ASTM A194 Grade 2H Heavy Hex Nuts

Blue wax coated ASTM A194 Grade 2H heavy hex nuts are high‑strength fastening components mainly used to match high‑strength bolts for pressure vessels, piping systems, petrochemical facilities, power engineering and heavy‑duty industrial equipment. The blue‑wax coating provides temporary anti‑rust performance and good thread lubricity during assembly, reducing galling and friction torque when tightening. They are suitable for outdoor and harsh working environments, widely applied in flange connections and structural bolted joints where strict mechanical performance and reliable fastening are required.

Blue Wax Coated ASTM A194 Grade 2H Heavy Hex Nuts of Technical Specification Sheet:

Item	Technical Feature
Standard	ASTM A194 Gr 2H
Material	High Strength Steel
Surface Finish	Blue Wax Coating
Thread Type	Precision Machined Thread
Performance	High Load & Anti-Loosening
Quality Control	Dimensional & Thread Inspection

Yokelink Product Quality Inspection Report

We provide comprehensive inspection services for machine bolts, including SGS test bolts and formal Production Part Inspect Report (PPIR). The SGS tests verify the bolts’ compliance with international standards like ASTM A307 and IEEE C135.80, covering mechanical properties and corrosion resistance. The PPIR details all inspection items, ensuring each machine bolt meets dimensional, performance and quality requirements, providing reliable quality assurance for overhead line and industrial applications.

Technical Specifications of Blue Wax Coated ASTM A194 Grade 2H Heavy Hex Nuts

Frequently Asked Questions (FAQ)

Q1: What is the primary purpose of the Blue Wax coating on ASTM A194 Gr 2H nuts?

A: The blue wax coating serves as a dedicated dry lubricant designed to prevent thread galling (cold-welding) during fast pneumatic, hydraulic, or impact-wrench tightening. It stabilizes the torque-friction coefficient ($k$-factor), ensuring that applied torque translates directly and predictably into accurate bolt clamping tension without seizing.

Q2: What is the structural difference between a standard Hex Nut and a Grade 2H Heavy Hex Nut?

A: A Heavy Hex Nut features a larger width across the flats and a greater thickness compared to a standard hex nut. This wider bearing face distributes compressive clamp loads over a larger area. Grade 2H nuts are quenched and tempered to achieve a minimum proof load of 175,000 psi, making them suitable for severe pressure and high-temperature services where standard commercial nuts would strip.

Q3:Which stud bolts are typically paired with ASTM A194 Gr 2H Blue Wax nuts?

A: Grade 2H nuts are matched with ASTM A193 Grade B7 alloy steel studs, ASTM A320 Grade L7 low-temperature studs, and ASTM A325 / A490 structural bolts. They are widely specified in pipeline flanges, valve assemblies, power utility framing, and steel erection.

Q4: How does the blue wax coating affect torque specifications during field assembly?

A: Because the blue wax lowers thread friction significantly compared to plain black steel, the torque required to achieve design bolt tension is reduced. Assembly teams should consult calibrated torque charts for lubricated threads (typically assuming a friction factor between $0.12$ and $0.15$) to prevent over-stretching the bolt during installation.

Q5: Can Blue Wax coated nuts be used in outdoor utility and marine applications?

A: Blue wax primarily provides lubrication and short-term transit corrosion defense. For heavy weather outdoor or marine exposure, Grade 2H nuts should be specified with base coatings such as Hot Dip Galvanizing (ASTM A153), Zinc Flake / Geomet, or Xylan/PTFE fluoropolymer, over which supplemental lubrication or wax can be applied.

YOKELINK – Your Reliable Partner for Power Hardware & Industrial Fasteners

About YOKELINK

YOKELINK is a professional manufacturer specializing in power line hardware, fastening solutions, and customized metal components for global markets.

With strong manufacturing capabilities, strict quality control, and years of export experience, YOKELINK provides reliable products for power utilities, transmission projects, industrial construction, and infrastructure applications.

We focus on delivering consistent quality, precise manufacturing, and dependable supply solutions to customers worldwide.

Why Choose YOKELINK?

1. Professional Manufacturing Capability

YOKELINK specializes in the production of:

Power line hardware
Pole line fittings
Overhead transmission components
High-strength nuts and bolts
Customized metal parts

Our experienced production team ensures stable quality from raw materials to finished products.

2. Strict Quality Control

Every batch is inspected through professional quality procedures, including:

✓ Dimensional inspection
✓ Thread gauge testing
✓ Mechanical performance testing
✓ Surface coating inspection
✓ Final packing inspection

We help customers reduce quality risks and ensure reliable field performance.

3. Standards & Customized Solutions

YOKELINK products are manufactured according to international standards and customer requirements.

We provide:

Standard products
Customized dimensions
Special surface treatments
OEM manufacturing services

From drawings to finished products, we support customers with complete solutions.

4. Reliable Export Experience

Serving global customers, YOKELINK understands international purchasing requirements, including:

Technical documentation

Quality inspection requirements
Export packaging
Delivery coordination

We make overseas sourcing easier and more reliable.

5. Focus on Long-Term Partnership

At YOKELINK, we believe successful cooperation is built on:

Quality + Reliability + Professional Service

Our goal is not only to supply products, but to become a trusted manufacturing partner for customers worldwide.

Contact Details

Ningbo Yokelink Machinery Co.,Limited

Contact Person: Mr. Tony

Tel: 86-574-86882908

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