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LRiga@AmericanBelleville.com (Les Riga)

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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)
AFM22-60-H13 22mm 0.901 1.590 0.286 0.301 0.015 28,890 313 417 60
AFM24-30-H13 24mm 0.977 1.709 0.212 0.233 0.021 14,820 175 233 30
AFM24-45-H13 24mm 0.977 1.709 0.257 0.274 0.017 21,670 256 341 45
AFM24-60-H13 24mm 0.977 1.709 0.296 0.311 0.015 29,210 345 460 60
AFM27-30-H13 27mm 1.095 1.917 0.235 0.260 0.025 18,200 242 322 30
AFM27-45-H13 27mm 1.095 1.917 0.286 0.307 0.021 27,340 363 484 45
AFM27-60-H13 27mm 1.095 1.917 0.330 0.347 0.017 36,460 484 646 60
AFM30-30-H13 30mm 1.213 2.123 0.267 0.292 0.025 23,120 341 455 30
AFM30-45-H13 30mm 1.213 2.123 0.325 0.346 0.021 35,030 517 690 45
AFM30-60-H13 30mm 1.213 2.123 0.374 0.393 0.019 47,170 696 929 60
AFM32-30-H13 32mm 1.281 2.310 0.301 0.330 0.029 30,330 478 637 30
AFM32-45-H13 32mm 1.281 2.310 0.376 0.400 0.024 48,020 756 1,008 45
AFM32-60-H13 32mm 1.281 2.310 0.422 0.443 0.021 60,840 958 1,277 60
AFM33-30-H13 33mm 1.320 2.330 0.298 0.325 0.027 28,600 464 619 30
AFM33-45-H13 33mm 1.320 2.330 0.363 0.386 0.023 44,070 716 954 45
AFM33-60-H13 33mm 1.320 2.330 0.418 0.438 0.020 58,540 951 1,268 60
AFM36-30-H13 36mm 1.449 2.580 0.322 0.354 0.032 34,430 610 813 30
AFM36-45-H13 36mm 1.449 2.580 0.392 0.419 0.027 51,750 917 1,222 45
AFM36-60-H13 36mm 1.449 2.580 0.451 0.474 0.023 68,410 1,212 1,616 60
AFM39-30-H13 39mm 1.560 2.680 0.364 0.393 0.029 43,470 834 1,112 30
Item ID Bolt Dia ID (min) OD (max) THK (Nom) OH (Ref) Deflection (Nom) LBS F 100% Torque (Lubricated) Torque (Dry) Bolt Stress (KSI)
AF1250-45-H13 1 1/4 1.281 2.310 0.376 0.400 0.024 48,030 750 1,001 45
AF1250-60-H13 1 1/4 1.281 2.310 0.422 0.443 0.021 60,840 951 1,268 60
AF1313-30-718 1 5/16 1.345 2.370 0.325 0.344 0.019 33,000 541.4 ft/lbs 722 ft/lbs 30
AF1375-250-177 1 3/8 1.406 2.470 0.250 0.278 0.031 25,000 430 570 20
AF1375-30-H13 1 3/8 1.406 2.470 0.332 0.362 0.030 36,630 630 839 30
AF1375-45-H13 1 3/8 1.406 2.470 0.404 0.429 0.025 54,910 944 1,258 45
AF1375-60-H13 1 3/8 1.406 2.470 0.465 0.487 0.022 73,210 1,258 1,678 60
AF1500-225-718 1 1/2 1.531 2.680 0.225 0.260 0.035 20,000 375 ft/lbs 500 ft/lbs
AF1500-250-177 1 1/2 1.531 2.680 0.250 0.281 0.034 26,000 488 650 18
AF1500-30-H13 1 1/2 1.531 2.680 0.364 0.396 0.032 44,010 825 1,100 30
AF1500-45-H13 1 1/2 1.531 2.680 0.443 0.470 0.027 65,970 1,237 1,649 45
AF1500-60-H13 1 1/2 1.531 2.680 0.510 0.533 0.023 87,990 1,650 2,200 60
AF1625-262-177 1 5/8 1.649 2.950 0.262 0.299 0.037 27,000 548 731 15
AF1625-30-H13 1 5/8 1.649 2.950 0.400 0.435 0.035 53,570 1,088 1,451 30
AF1625-468-177 1 5/8 1.649 2.950 0.468 0.490 0.022 92,000 1,870 2,490 50
AF1625-45-H13 1 5/8 1.649 2.950 0.487 0.516 0.029 80,390 1,633 2,177 45
AF1625-60-H13 1 5/8 1.649 2.950 0.560 0.586 0.026 106,970 2,173 2,897 60
AF1750-280-177 1 3/4 1.774 3.170 0.280 0.323 0.043 31,000 678 904 15
AF1750-30-H13 1 3/4 1.774 3.170 0.432 0.470 0.038 62,480 1,367 1,822 30
AF1750-45-H13 1 3/4 1.774 3.170 0.526 0.557 0.031 93,760 2,051 2,735 45
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