Home » Monel 400 Washer

UNS N04400, 2.4360, NW 4400, Monel Alloy 400 Flat Washers

UNS N04400, 2.4360, NW 4400 Monel 400 Spring Washer

UNS N04400, 2.4360, NW 4400, Monel Alloy 400 Lock Washer

UNS N04400, 2.4360, NW 4400, Monel 400 Plain Washer
Monel 400 is a nickel-copper alloy renowned for its high strength and corrosion resistance in various environments, including seawater and chemical processing. Composed primarily of nickel (around 67%) and copper (approximately 28%), with small additions of iron, manganese, silicon, and carbon, Monel 400 exhibits excellent mechanical properties even at elevated temperatures. Its resistance to corrosion makes it an ideal choice for applications in marine engineering, chemical processing, and aerospace industries.
Monel 400 washers are extensively used in environments where corrosion is a concern, such as marine equipment, offshore oil rigs, chemical processing plants, and the construction of heat exchangers and boilers. Their superior resistance to corrosion and erosion makes them indispensable in these demanding applications, ensuring longevity and reliability.

Monel 400 washers may adhere to various international standards and certifications to ensure their quality and suitability for specific applications. Common certifications include ASTM (American Society for Testing and Materials) standards such as ASTM B164 for nickel-copper alloy rods and bars and ASTM B127 for nickel-copper alloy plates, sheets, and strips. Additionally, manufacturers may provide compliance certifications with industry-specific standards such as ASME (American Society of Mechanical Engineers) or ISO (International Organization for Standardization) standards.
Monel 400 washers are typically categorized based on their mechanical properties, such as tensile strength, yield strength, and elongation. Grades may vary depending on the manufacturing process and specific requirements of the application. Common grades include standard grade Monel 400, which offers a balance of strength and corrosion resistance, and high-strength grades for applications requiring increased mechanical properties.
Specification : ASTM B164/ ASME SB164
Size : M02 to M33 | Custom Sizes
Length : 3 to 200 mm
Standard : ISO, ASTM, DIN, JIS, IS, GB, BS, and all International Standards
DIN Standard : B.S. DIN 931, DIN 933, DIN 912, DIN 934, DIN 6923, DIN 603, DIN 7981, DIN 970, DIN916, DIN 7982, DIN 7985, DIN 913
UTS : NPT, UNS, UNF, UNC, UNEF, NPTF
ISO : ISO 4033, ISO 4032, ISO 7380, ISO 4017, JIS standards
Threads : METRIC, BSW, UNC, UNF, BSF or as required
Types : Lock Washer, Flat Washer, Split Washer, Sealing Washer, Machine Washer, Slot Washer, Star Washer Springs – Flat Spring & Wire Spring

| STANDARD | WERKSTOFF NR. | UNS | GOST | AFNOR | JIS | BS | EN |
| Monel 400 | 2.4360 | N04400 | МНЖМц 28-2,5-1,5 | NU-30M | NW 4400 | NA 13 | NiCu30Fe |






WE MANUFACTURE Monel 400 Washers AS PER INTERNATIONAL STANDARDS & SPECIFICATIONS. Monel® Alloy 400 Washer MANUFACTURERS IN INDIA, CUSTOM SIZES Monel 400 Lock, Plain, Star, Spring, Ogee Washers CAN BE PRODUCED AS PER CLIENT DRAWING.
| Size | USS | SAE | ||||
|---|---|---|---|---|---|---|
| Inside Diameter (A) |
Outside Diameter (B) |
Thickness (C) |
Inside Diameter (A) |
Outside Diameter (B) |
Thickness (C) |
|
| #2 | – | – | – | 3/32″ | 1/4″ | 0.020″ |
| #4 | – | – | – | 1/8″ | 5/16″ | 0.032″ |
| #6 | – | – | – | 5/32″ | 3/8″ | 0.049″ |
| #8 | – | – | – | 3/16″ | 7/16″ | 0.049″ |
| #10 | – | – | – | 7/32″ | 1/2″ | 0.049″ |
| #12 | – | – | – | 1/4″ | 9/16″ | 0.065″ |
| 1″ | 1-1/16″ | 2-1/2″ | 0.165″ | 1-1/16″ | 2″ | 0.134″ |
| 1/2″ | 9/16″ | 1-3/8″ | 0.109″ | 17/32″ | 1-1/16″ | 0.095″ |
| 1/4″ | 5/16″ | 0.734″ | 0.065″ | 9/32″ | 5/8″ | 0.065″ |
| 1-1/2″ | 1-5/8″ | 3-1/2″ | 0.180″ | – | – | – |
| 1-1/4″ | 1-3/8″ | 3″ | 0.165″ | – | – | – |
| 1-1/8″ | 1-1/4″ | 2-3/4″ | 0.165″ | – | – | – |
| 1-3/4″ | 1-7/8″ | 4″ | 0.180″ | – | – | – |
| 1-3/8″ | 1-1/2″ | 3-1/4″ | 0.180″ | – | – | – |
| 1-5/8″ | 1-3/4″ | 3-3/4″ | 0.180″ | – | – | – |
| 2″ | 2-1/8″ | 4-1/2″ | 0.213″ | – | – | – |
| 3/4″ | 13/16″ | 2″ | 0.148″ | 13/16″ | 1-15/32″ | 0.134″ |
| 3/8″ | 7/16″ | 1″ | 0.083″ | 13/32″ | 13/16″ | 0.065″ |
| 5/8″ | 11/16″ | 1-3/4″ | 0.134″ | 21/32″ | 1-5/16″ | 0.095″ |
| 5/16″ | 3/8″ | 7/8″ | 0.083″ | 11/32″ | 11/16″ | 0.065″ |
| 7/8″ | 15/16″ | 2-1/4″ | 0.165″ | 15/16″ | 1-3/4″ | 0.134″ |
| 7/16″ | 1/2″ | 1-1/4″ | 0.083″ | 15/32″ | 15/16″ | 0.065″ |
| 9/16″ | 5/8″ | 1-15/32″ | 0.109″ | 19/32″ | 1-5/32″ | 0.095″ |
| NOM SIZE | Inner Dia (d) Basic Tol (+) | Outer Dia (d1) Max | WIDTH (b) Basic Tol (+ or -) | THICKNESS (S) Basic Tol (+ or -) | Weight per 1000 in Kgs | |||
| 3 | 3.1 | 0.3 | 6.2 | 1.3 | 0.1 | 0.8 | 0.1 | 0.11 |
| 4 | 4.1 | 0.3 | 7.6 | 1.5 | 0.1 | 0.9 | 0.1 | 0.18 |
| 5 | 5.1 | 0.3 | 9.2 | 1.8 | 0.1 | 1.2 | 0.1 | 0.36 |
| 6 | 6.1 | 0.4 | 11.8 | 2.5 | 0.15 | 1.6 | 0.1 | 0.83 |
| 8 | 8.1 | 0.4 | 14.8 | 3 | 0.15 | 2 | 0.1 | 1.60 |
| 10 | 10.2 | 0.5 | 18.1 | 3.5 | 0.2 | 2.2 | 0.15 | 2.53 |
| 12 | 12.2 | 0.5 | 21.1 | 4 | 0.2 | 2.5 | 0.15 | 3.82 |
| 14 | 14.2 | 0.5 | 24.1 | 4.5 | 0.2 | 3 | 0.15 | 6.01 |
| 16 | 16.2 | 0.8 | 27.4 | 5 | 0.2 | 3.5 | 0.2 | 8.91 |
| 18 | 18.2 | 0.8 | 29.4 | 5 | 0.2 | 3.5 | 0.2 | 9.73 |
| 20 | 20.2 | 1 | 33.6 | 6 | 0.2 | 4 | 0.2 | 15.20 |
| 22 | 22.5 | 1 | 35.9 | 6 | 0.2 | 4 | 0.2 | 16.50 |
| 24 | 24.5 | 1 | 40 | 7 | 0.25 | 5 | 0.2 | 26.20 |
| 27 | 27.5 | 1 | 43 | 7 | 0.25 | 5 | 0.2 | 28.70 |
| 30 | 30.5 | 1.2 | 48.2 | 8 | 0.25 | 6 | 0.2 | 44.30 |
| 33 | 33.5 | 1.2 | 55.2 | 10 | 0.25 | 6 | 0.2 | 63.00 |
| 36 | 36.5 | 1.2 | 58.2 | 10 | 0.25 | 6 | 0.2 | 67.30 |
| 39 | 39.5 | 1.2 | 61.2 | 10 | 0.25 | 6 | 0.2 | 71.70 |
| 42 | 42.5 | 1.2 | 68.2 | 12 | 0.25 | 7 | 0.25 | 111.00 |
| 45 | 45.5 | 1.2 | 71.2 | 12 | 0.25 | 7 | 0.25 | 117.00 |
| 48 | 49 | 1.5 | 75 | 12 | 0.25 | 7 | 0.25 | 123.00 |
| 52 | 53 | 1.5 | 83 | 14 | 0.25 | 8 | 0.25 | 320.00 |
| Bolt Size | USS | SAE | ||||
| OD (in.) | ID (in.) | Thickness | OD (in.) | ID (in.) | Thickness | |
1 |
2.500 |
1.062 |
.136/.192 |
2.000 |
1.062 |
.108/.160 |
1/2 |
1.375 |
0.562 |
.086/.132 |
1.062 |
0.531 |
.074/.121 |
1/4 (#14) |
0.734 |
0.312 |
.051/.080 |
0.625 |
0.281 |
.051/.080 |
1/8 (#6) |
– |
– |
– |
0.375 |
0.156 |
.036/.065 |
2 |
4.500 |
2.125 |
.153/.213 |
– |
– |
– |
3 |
5.500 |
3.125 |
.249/.327 |
– |
– |
– |
3/4 |
2.000 |
0.812 |
.122/.177 |
1.469 |
0.812 |
.108/.160 |
3/8 |
1.000 |
0.438 |
.064/.104 |
0.812 |
0.406 |
.051/.080 |
3/16 (#10) |
0.560 |
0.250 |
.036/.065 |
0.500 |
0.220 |
.036/.065 |
5/8 |
1.750 |
0.688 |
.108/.160 |
1.312 |
0.656 |
.074/.121 |
5/16 |
0.875 |
0.375 |
.064/.104 |
0.688 |
0.344 |
.051/.080 |
5/32 (#8) |
– |
– |
– |
0.438 |
0.188 |
.036/.065 |
7/8 |
2.250 |
0.938 |
.136/.192 |
1.750 |
0.938 |
.108/.160 |
7/16 |
1.250 |
0.500 |
.064/.104 |
0.922 |
0.469 |
.051/.080 |
7/32 (#12) |
– |
– |
– |
0.562 |
0.250 |
.051/.080 |
9/16 |
1.469 |
0.625 |
.086/.132 |
1.156 |
0.594 |
.074/.121 |
1 1/2 |
3.500 |
1.625 |
.153/.213 |
3.000 |
1.625 |
.153/.213 |
1 1/4 |
3.000 |
1.375 |
.136/.192 |
2.500 |
1.375 |
.136/.192 |
1 1/8 |
2.750 |
1.250 |
.136/.192 |
2.250 |
1.250 |
.108/.160 |
1 3/4 |
4.000 |
1.875 |
.153/.213 |
– |
– |
– |
1 3/8 |
3.250 |
1.500 |
.153/.213 |
2.750 |
1.500 |
.136/.213 |
1 5/8 |
3.750 |
1.750 |
.153/.213 |
– |
– |
– |
1 7/8 |
4.250 |
2.000 |
.153/.213 |
– |
– |
– |
2 1/2 |
5.000 |
2.625 |
.210/.280 |
– |
– |
– |
2 1/4 |
4.750 |
2.375 |
.320/.248 |
– |
– |
– |
2 3/4 |
5.250 |
2.875 |
.228/.410S |
– |
– |
– |
| Standard | Description |
|---|---|
| AS 1237.1-2002 | Plain washers |
| AS 1237.1-2002 | Small plain washers |
| ASTM F436-2010 | Extra Thick clipped washers |
| ASTM F436M-2010 | Clipped washers |
| ANSI B18.2.6-2003 | Steel Circular clipped washers |
| ANSI B18.22.1A-1981 | Type A Plain washers |
| ANSI B18.22.1B-1981 | Type B Plain washers |
| ANSI B18.22.1A-1965 | Type A Plain washers |
| ANSI B18.22.1B-1965 | Type B Plain washers |
| DIN 125-2 | Type A washers |
| DIN 125-2 | Type B washers |

| APPROX. WEIGHT IN KGS FOR 100 NOS | |||||||||||||
| 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 |
SPRING WASHER FLAT SECTION BS:1802-1951 | SPRING WASHER SQUARE SECTION BS:1802-1951 | |||
| 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 | |||||||||||
| Grade | Ni | Fe | C | Mn | Si | Cu | Al | S |
| Monel 400 | 63.0 min | 1.0 – 2.5 | 0.3 max | 2.0 max | 0.5 max | 28.0 – 34.0 | 0.50 max | 0.02 max |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.8 g/cm3 | 1350 °C (2460 °F) | Psi – 80000 , MPa – 550 | Psi – 35000 , MPa – 240 | 40 % |
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