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LRiga@AmericanBelleville.com (Les Riga)

PBlossom@AmericanBelleville.com (Perry Blossom)
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Contact Us

Contact Us

We would like to hear from you. Please send us a message by filling out the form below and we will get back with you shortly.

Maximum file size: 516MB

If you prefer, you may directly email our team by clicking one of the links below:

LRiga@AmericanBelleville.com (Les Riga)

PBlossom@AmericanBelleville.com (Perry Blossom)

Flange Washers

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American Belleville’s Flange Washer line adds deflection to bolted joints in order to dramatically reduce the effects of large fluctuations in temperature within the application, vibration, bolt creep (stretch), gasket creep, or relaxation, and other elastic interactions within the joint. They may be flattened, without losing operating preload, except in cases where dynamic cycling occurs. Typically, at least two American Belleville Flange Washers will be used in a single bolted assembly, with one on either end of the bolt. The ID, on the convex side of the washer, should contact the underside of the bolt head and the nut. The OD edge on the concave side of the washer should always contact the flange surface.

Belleville Washer                       Disc washer

American Belleville Flange Washers can be specified by identifying a few characteristics of the application, starting with bolt diameter and bolt stress; the latter calling out either 30,000 psi, 45,000 psi or 60,000 psi. They can be utilized in either inch or metric applications, and are typically made using three different raw material options:

  • H13 Tool Steel (ASTM A681) for refining and chemical flange bolting applications with temperatures reaching over 1000 deg. F, where corrosion resistance is not crucial, but high strength is. This material is fully magnetic.
  • 17/7PH Stainless Steel (ASTM A693) for refining and chemical flange bolting applications reaching 500 deg. F, and where high strength and corrosion resistance is needed. This material is highly magnetic.
  • Inconel 718 (ASTM B670 / AMS 5596) for flange bolting applications reaching over 1000 deg. F. This material is highly corrosion resistant, offers good strength properties and is non-magnetic.

Traditional applications for American Belleville Flange Washers include:

  • Pipe Flanges
  • Heat Exchangers
  • Valves

Low-temperature applications (Cryogenic) can also utilize American Belleville Flange Washers

We will work closely with you to specify or design, and then manufacture the proper part for your application. Contact us online or call 440-721-8350.

Not finding what you’re looking for? Try:

Flange Washers - Search
Item ID Bolt Dia ID (min) OD (max) THK (Nom) OH (Ref) Deflection (Nom) LBS F 100% Torque (Lubricated) Torque (Dry) Bolt Stress (KSI)
AFM39-45-H13 39mm 1.560 2.680 0.443 0.467 0.024 64,870 1,245 1,660 45
AFM39-60-H13 39mm 1.560 2.680 0.510 0.533 0.023 87,350 1,677 2,235 60
AFM40-30-H13 40mm 1.596 2.880 0.386 0.420 0.034 50,000 984 1,312 30
AFM40-45-H13 40mm 1.596 2.880 0.469 0.497 0.028 74,320 1,463 1,951 45
AFM40-60-H13 40mm 1.596 2.880 0.548 0.574 0.026 102,790 2,023 2,698 60
AFM42-30-H13 42mm 1.687 2.950 0.410 0.444 0.034 55,910 1,156 1,541 30
AFM42-45-H13 42mm 1.687 2.950 0.499 0.526 0.027 83,770 1,731 2,309 45
AFM42-60-H13 42mm 1.687 2.950 0.574 0.599 0.025 111,510 2,305 3,073 60
AFM48-30-H13 48mm 1.899 3.389 0.465 0.505 0.040 72,390 1,710 2,280 30
AFM48-45-H13 48mm 1.899 3.389 0.566 0.599 0.033 108,540 2,564 3,419 45
AFM48-60-H13 48mm 1.899 3.389 0.581 0.614 0.033 114,520 2,705 3,607 60
AFM52-30-H13 52mm 2.079 3.600 0.513 0.551 0.038 78,130 1,999 2,666 30
AFM52-45-H13 52mm 2.079 3.600 0.622 0.656 0.034 129,800 3,322 4,429 45
AFM52-60-H13 52mm 2.079 3.600 0.718 0.743 0.025 157,620 4,034 5,378 60
AFM72-30-H13 72mm 2.894 5.064 0.711 0.766 0.055 168,280 5,963 7,950 30
AFM72-45-H13 72mm 2.894 5.064 0.872 0.917 0.045 255,220 9,043 12,058 45
AFM72-60-H13 72mm 2.894 5.064 0.997 1.037 0.040 336,630 11,928 15,904 60
AFM80-30-H13 80mm 3.210 5.512 0.750 0.810 0.060 185,560 7,306 9,741 30
AFM80-45-H13 80mm 3.210 5.512 0.964 1.011 0.047 309,580 12,188 16,251 45
AFM80-60-H13 80mm 3.210 5.512 1.047 1.090 0.043 362,630 14,277 19,036 60
Item ID Bolt Dia ID (min) OD (max) THK (Nom) OH (Ref) Deflection (Nom) LBS F 100% Torque (Lubricated) Torque (Dry) Bolt Stress (KSI)
AF2750-60-H13 2 3/4 2.781 4.920 0.869 0.915 0.046 255,700 8,790 11,720 60
AF3000-468-177 3 3.031 5.360 0.470 0.540 0.070 88,000 3,300 4,400 15
AF3000-30-H13 3 3.031 5.360 0.761 0.822 0.061 193,690 7,263 9,685 30
AF3000-45-H13 3 3.031 5.360 0.927 0.978 0.051 290,640 10,899 14,532 45
AF3000-60-H13 3 3.031 5.360 0.952 1.002 0.050 306,900 11,509 15,345 60
AF3250-30-H13 3 1/4 3.306 5.810 0.770 0.837 0.067 196,870 7,998 10,664 30
AF3250-45-H13 3 1/4 3.306 5.810 0.980 1.033 0.053 322,860 13,116 17,488 45
AF3250-60-H13 3 1/4 3.306 5.810 1.037 1.087 0.050 360,860 14,660 19,547 60
AF3500-30-H13 3 1/2 3.530 6.125 0.841 0.901 0.060 209,340 9,159 12,212 30
AF3500-45-H13 3 1/2 3.530 6.125 1.024 1.080 0.056 351,510 15,379 20,505 45
AF3500-60-H13 3 1/2 3.530 6.125 1.179 1.227 0.048 463,550 20,280 27,040 60
AF3750-30-H13 3 3/4 3.812 6.671 0.871 0.948 0.077 250,590 11,746 15,662 30
AF3750-45-H13 3 3/4 3.812 6.671 1.062 1.126 0.064 377,770 17,708 23,611 45
AF3750-60-H13 3 3/4 3.812 6.671 1.222 1.278 0.056 503,740 23,613 31,484 60
AF4000-30-H13 4 4.054 7.135 0.970 1.050 0.080 312,780 15,639 20,852 30
AF4000-45-H13 4 4.054 7.135 1.180 1.247 0.067 469,050 23,453 31,270 45
AF4000-60-H13 4 4.054 7.135 1.359 1.417 0.058 624,040 31,202 41,603 60
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