At Unifit Fasteners, we manufacture and supply high-performance Monel 400 Washers built for harsh industrial environments. Made from nickel-copper alloy UNS N04400, these washers offer exceptional resistance to seawater, acids and alkalis making them ideal for marine, offshore, chemical and energy sectors. Engineered for dimensional precision and long-term reliability, our washers conform to ASTM B127, ASME SB127, DIN and ISO standards and are available in flat, spring, lock, and sealing types. With fast turnaround, full traceability and export-ready inventory, Unifit is the trusted partner for corrosion-resistant fastening solutions in mission-critical applications.
Request QuoteWhy Choose Monel 400 Washers from Unifit?
At Unifit Fasteners, we bring decades of metallurgical expertise to every washer we produce. Our Monel 400 washers are manufactured using premium-grade UNS N04400 alloy ensuring superior corrosion resistance in aggressive environments like seawater, brine, chemical media, and high-temperature systems.
What sets Unifit apart:
- Precision Manufacturing: CNC-machined to exact tolerances for critical fit and function.
- Global Standards Compliance: Supplied as per ASTM B127, DIN, and ISO norms.
- Corrosion-Proof Performance: Trusted in offshore, marine, and chemical processing applications.
- Flexible Sizing: Available in metric, imperial, and custom profiles.
- Quick Turnaround & Global Reach: Reliable delivery backed by a strong export network.
Whether it’s for flange sealing, vibration damping, or high-pressure joints. Unifit’s Monel 400 washers deliver durability, dimensional accuracy and long-term performance where failure isn’t an option.
Types of Monel 400 Washers Offered by Unifit
Whether you're sealing flanges in marine systems or dampening vibrations in chemical plants, each washer type is crafted with precision and reliability in mind. Below is a list of popular Monel 400 washer variants available in multiple dimensions, thicknesses, and international standards:
- Monel 400/K500 Dome Washers
- Monel 400/K500 Hex Washers
- Monel 400/K500 Tab Washers
- Monel 400/K500 Conical Washers
- Monel Alloy 400/K500 Lock Washer
- Monel 400/K500 Cup Washers
- Monel 400/K500 Belleville Washers
- Monel 400/K500 Wave Washers
- Monel 400/K500 Bevel Washers
- Monel 400/K500 Bonded Sealing Washer
- Monel 400/K500 Hexagon Washer
- Monel 400/K500 Machine Washer
- Monel 400/K500 Dock Washers
- Monel 400/K500 Split Lock Washers
- Monel 400/K500 Tooth Washer
- Monel 400/K500 C Washers
- Monel 400/K500 Finishing Washers
- Monel 400/K500 Hillside Washers
- Monel 400/K500 Spherical Washers
- Monel 400/K500 Taper Washers
- Monel 400/K500 Serrated Washers
- Monel 400/K500 Split Washers
- Monel 400 Square Beveled Washers
- Monel 400 Curved Spring Washers
- Alloy K500 Dome Spring Washers
- Monel 400 Internal Tooth Lock Washer
- Alloy 400 Wave Spring Washers
- Monel 400/K500 Split Ring Washers
- Monel 400/K500 Star Lock Washer
- Monel 400 External Tooth Lock Washer
- Monel 400/K500 Hexagonal Washer
- Monel 400/K500 Slotted Washers
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Monel 400 Washers Sizes & Dimensions
Whether you're working in high-pressure pipelines or corrosive marine assemblies, our sizing ensures secure load distribution, vibration resistance, and long-term reliability. Below is a detailed size chart showing the inner diameter (A), outer diameter (B), thickness (C) and approximate weight per 100 pieces:
| Inside Diameter (A) | Outside Diameter (B) | Thickness (C) | Weight (lbs) per 100 pcs |
|---|---|---|---|
| 1/2" | 9/16" | 1 3/8" | 0.109" |
| 5/8" | 11/16" | 1 3/4" | 0.134" |
| 3/4" | 13/16" | 2" | 0.148" |
| 7/8" | 15/16" | 2 1/4" | 0.165" |
| 1" | 11/16" | 2 1/2" | 0.165" |
| 1 1/8" | 1 1/4" | 2 3/4" | 0.165" |
| 1 1/4" | 1 3/8" | 3" | 0.165" |
| 1 3/8" | 1 1/2" | 3 1/4" | 0.180" |
| 1 1/2" | 1 5/8" | 3 1/2" | 0.180" |
| 1 5/8" | 1 3/4" | 3 3/4" | 0.180" |
| 1 3/4" | 1 7/8" | 4" | 0.180" |
| 1 7/8" | 2" | 4 1/4" | 0.180" |
| 2" | 2 1/8" | 4 1/2" | 0.180" |
| 2 1/4" | 2 3/8" | 4 3/4" | 0.220" |
| 2 1/2" | 2 5/8" | 5" | 0.238" |
| 2 3/4" | 2 7/8" | 5 1/4" | 0.259" |
| 3" | 3 1/8" | 5 1/2" | 0.284" |
Note: Custom sizes, special thicknesses and non-standard OD/ID configurations can be manufactured on request to meet specific application needs.
Monel 400 Grade Washers Weight Chart (Per 100 Pieces)
At Unifit Fasteners, we follow standard IS and DIN specifications to ensure dimensional uniformity and mechanical integrity across all washer types like plain, heavy, machined, spring and special profile washers for structural applications.The table below provides estimated weight (in kilograms) per 100 pieces across different washer standards and sizes:
| SIZE | PLAIN PUNCHED WASHER IS:2016 |
HEAVY WASHER IS:6610 |
MACHINED WASHER IS:2016 |
SQUARE TAPER WASHERS | SPRING WASHER FLAT SECTION IS:3063-72 | SPRING WASHER SQUARE SECTION IS:6735-72 DIN: 7980 |
Size (Inches) | PLAIN PUNCHED WASHER BS:3410 TABLE 7 |
|||
|---|---|---|---|---|---|---|---|---|---|---|---|
| MACHINED | HIGH STRENGTH FRICTION GRIP | ||||||||||
| FOR CHANNELS IS:5372-75 | FOR I-BEAM IS:5374-75 | TYPE-B (CHANNELS) IS:6649-85 | TYPE-C (I-BEAMS) IS:6649-85 | ||||||||
| M-3 | 0.01 | 0.01 | |||||||||
| M-4 | 0.02 | 0.02 | |||||||||
| M-5 | 0.04 | 0.04 | 0.03 | 0.03 | |||||||
| M-6 | 0.11 | 0.11 | 0.08 | 0.04 | 1/4" | 0.21 | |||||
| M-8 | 0.20 | 0.21 | 1.10 | 1.20 | 0.16 | 0.11 | 5/16" | 0.35 | |||
| M-10 | 0.39 | 1.60 | 0.40 | 1.00 | 1.10 | 0.25 | 0.20 | 3/8" | 0.48 | ||
| M-12 | 0.58 | 1.90 | 0.62 | 2.00 | 2.20 | 2.00 | 1.80 | 0.38 | 0.23 | 1/2" | 1.07 |
| M-14 | 0.82 | 0.60 | 0.38 | ||||||||
| M-16 | 1.06 | 2.90 | 1.13 | 3.40 | 3.75 | 9.00 | 8.50 | 0.89 | 0.59 | 5/8" | 1.85 |
| M-18 | 1.27 | 0.97 | 0.66 | ||||||||
| M-20 | 1.64 | 4.40 | 1.72 | 5.80 | 6.70 | 8.50 | 8.00 | 1.52 | 1.23 | 3/4" | 2.91 |
| M-22 | 1.75 | 7.50 | 7.00 | 1.65 | 1.36 | 7/8" | 4.27 | ||||
| M-24 | 3.11 | 6.30 | 3.30 | 13.50 | 16.00 | 6.50 | 6.00 | 2.62 | 1.81 | 1" | 6.13 |
| M-27 | 3.94 | 8.00 | 4.23 | 12.50 | 15.00 | 12.00 | 11.50 | 2.87 | 2.06 | 1.1/8" | 7.69 |
| M-30 | 5.05 | 10.10 | 5.36 | 16.50 | 18.70 | 17.50 | 16.00 | 4.43 | 3.20 | 1.1/4" | 9.90 |
| M-33 | 7.10 | 12.00 | 7.54 | 21.00 | 23.50 | 23.00 | 22.50 | 6.30 | 3.50 | ||
| M-36 | 8.73 | 14.60 | 9.20 | 25.50 | 29.20 | 26.50 | 26.00 | 6.73 | 5.25 | 1.1/2" | 17.24 |
| M-39 | 12.60 | 16.70 | 13.30 | 28.30 | 34.50 | 7.17 | 5.61 | ||||
| M-42 | 17.50 | 20.10 | 18.30 | 11.10 | 8.00 | ||||||
| M-45 | 21.20 | 22.20 | 22.00 | 11.70 | 8.53 | ||||||
| M-48 | 28.40 | 26.00 | 29.40 | 12.30 | 9.00 | 2" | 27.78 | ||||
| M-52 | 31.90 | 33.00 | 18.20 | ||||||||
| M-56 | 47.90 | 19.30 | |||||||||
| M-60 | 51.60 | 20.30 | |||||||||
| M-64 | 55.40 | 21.80 | |||||||||
| M-68 | 57.40 | ||||||||||
| M-72 | 63.40 | 24.00 | |||||||||
Monel 400 Washer Tolerance Chart
The chart below outlines standard dimensional tolerances for inside diameter, outside diameter, and thickness ensuring a reliable fit and consistent performance across demanding industrial environments.
| Washer Size (Nominal) | Inside Diameter Tolerance (± mm) | Outside Diameter Tolerance (± mm) | Thickness Tolerance (± mm) |
|---|---|---|---|
| M6 | ±0.2 | ±0.3 | ±0.15 |
| M8 | ±0.2 | ±0.3 | ±0.15 |
| M10 | ±0.3 | ±0.4 | ±0.2 |
| M12 | ±0.3 | ±0.4 | ±0.2 |
| M16 | ±0.4 | ±0.5 | ±0.25 |
| M20 | ±0.5 | ±0.6 | ±0.3 |
Industrial Applications of Monel 400 Washers
Monel 400 washers are trusted in industries where corrosion, heat and mechanical stress are constant challenges. Their excellent resistance to seawater, acids and alkaline solutions makes them ideal for load distribution and sealing in harsh environments.
Key Application Areas:
- Marine & Offshore
- Chemical Processing
- Oil & Gas
- Aerospace
- Power Generation
- Food & Beverage
- Pharmaceutical
- Water Treatment & Desalination
- Heat Exchangers & Boilers
- Pulp & Paper Industry
Instant Quote on Monel 400 Washers – Delivered Globally!
Looking for high-performance Monel 400 Washers for your next industrial project? At Unifit Fasteners, we offer precision-crafted washers made from corrosion-resistant UNS N04400 alloy trusted across marine, chemical and offshore sectors.
Whether you need standard sizes or custom specifications, we ensure fast turnaround, global shipping, and full compliance with ASTM and DIN standards. Submit your requirements below and our team will provide a competitive, no-obligation quote tailored to your needs.
Fast Response. Trusted Quality. Global ReachLeading Monel 400 Washers Manufacturer, Supplier & Global Exporter
At Unifit Metalloys Inc., we specialize in the production and supply of Monel 400 washers designed for durability, dimensional accuracy, and resistance to aggressive corrosive environments. As a trusted Monel 400 washers manufacturer in India, our offerings cater to a wide spectrum of industries including offshore platforms, petrochemical units and power plants.
With a deep understanding of alloy engineering and international fastener standards, we deliver both standard and custom washer solutions be it flat, spring or machined types tailored to exact specifications. Unifit stands among the top Monel 400 washers suppliers and exporters, providing reliable supply chains and compliant documentation to clients across Europe, the Middle East, Southeast Asia, and North America.
Whether your requirement is project-based or ongoing procurement, Unifit ensures timely delivery, superior build quality and competitive pricing for every order.
Request QuoteFrequently Asked Questions About Monel 400 Washers
What are Monel 400 washers used for?
Monel 400 washers are primarily used in marine, chemical processing, power generation and offshore environments due to their high corrosion resistance and mechanical durability.
How does Monel 400 compare to stainless steel for washers?
Unlike stainless steel, Monel 400 offers superior resistance to saltwater, acids and alkalis. It performs better in highly corrosive environments and has higher strength retention over a wider temperature range.
Do you supply washers for critical offshore or nuclear applications?
Absolutely. Our Monel 400 washers are used in critical sectors such as offshore rigs and nuclear facilities due to their reliability, strength and compliance with stringent industry norms.
What is the lead time for international orders of Monel 400 washers?
Typical lead times range from 3–10 working days depending on size, quantity and customization. We offer global shipping with export documentation support.