Inch Series Bolt Washers
BelleFlex® bolt washers maintain tension in bolted assemblies. They compensate for a variety of environmental conditions, such as thermal expansion and contraction. This group of disc springs should not be used for dynamic or precise load applications without analyzing stress levels.
The load values listed in the table below are according to the calculated theoretical load curve based on the dimensions and material for each part number.
| Part Number | Bolt Size | OD | ID | Thick | Dish | Load 75% (lb) | Load 100% (lb) |
|---|---|---|---|---|---|---|---|
| BW0500-AA-018 | 1/4" | 0.5 | 0.258 | 0.018 | 0.015 | 56 | 68 |
| BW0500-AA-025 | 1/4" | 0.5 | 0.258 | 0.025 | 0.014 | 133 | 169 |
| BW0500-AA-038 | 1/4" | 0.5 | 0.258 | 0.038 | 0.01 | 322 | 425 |
| BW0687-AA-052 | 1/4" | 0.687 | 0.258 | 0.052 | 0.016 | 619 | 814 |
| BW0750-AA-036 | 1/4" | 0.75 | 0.258 | 0.036 | 0.019 | 207 | 265 |
| BW0750-AA-052 | 1/4" | 0.75 | 0.258 | 0.052 | 0.014 | 446 | 588 |
| BW0875-AA-075 | 1/4" | 0.875 | 0.258 | 0.075 | 0.012 | 824 | 1094 |
| BW0625-BB-022 | 5/16" | 0.625 | 0.32 | 0.022 | 0.019 | 84 | 100 |
| BW0625-BB-032 | 5/16" | 0.625 | 0.32 | 0.032 | 0.017 | 215 | 275 |
| BW0625-BB-047 | 5/16" | 0.625 | 0.32 | 0.047 | 0.013 | 505 | 666 |
| BW0687-BB-052 | 5/16" | 0.687 | 0.32 | 0.052 | 0.015 | 622 | 818 |
| BW0875-BB-040 | 5/16" | 0.875 | 0.32 | 0.04 | 0.024 | 270 | 341 |
| BW0937-BB-070 | 5/16" | 0.937 | 0.32 | 0.07 | 0.026 | 1306 | 1705 |
| BW1000-BB-090 | 5/16" | 1 | 0.32 | 0.09 | 0.013 | 1188 | 1579 |
| BW1125-BB-062 | 5/16" | 1.125 | 0.32 | 0.062 | 0.022 | 523 | 685 |
| BW0750-CC-034 | 3/8" | 0.75 | 0.385 | 0.034 | 0.022 | 237 | 297 |
| BW0750-CC-040 | 3/8" | 0.75 | 0.385 | 0.04 | 0.02 | 342 | 439 |
| BW0750-CC-056 | 3/8" | 0.75 | 0.385 | 0.056 | 0.015 | 685 | 904 |
| BW0750-CC-062 | 3/8" | 0.75 | 0.385 | 0.062 | 0.017 | 1055 | 1390 |
| BW0750-CC-076 | 3/8" | 0.75 | 0.385 | 0.076 | 0.033 | 3837 | 4970 |
| BW0875-CC-062 | 3/8" | 0.875 | 0.385 | 0.062 | 0.013 | 546 | 723 |
| BW0875-CC-089 | 3/8" | 0.875 | 0.385 | 0.089 | 0.012 | 1486 | 1975 |
| BW0875-CC-109 | 3/8" | 0.875 | 0.385 | 0.109 | 0.017 | 3870 | 5140 |
| BW0937-CC-070 | 3/8" | 0.937 | 0.385 | 0.07 | 0.025 | 1305 | 1706 |
| BW1000-CC-062 | 3/8" | 1 | 0.385 | 0.062 | 0.032 | 1023 | 1309 |
| BW1000-CC-105 | 3/8" | 1 | 0.385 | 0.105 | 0.015 | 2243 | 2981 |
| BW1125-CC-053 | 3/8" | 1.125 | 0.385 | 0.053 | 0.029 | 450 | 573 |
| BW1125-CC-078 | 3/8" | 1.125 | 0.385 | 0.078 | 0.02 | 954 | 1259 |
| BW1187-CC-089 | 3/8" | 1.187 | 0.385 | 0.089 | 0.033 | 2110 | 2754 |
| BW1187-CC-098 | 3/8" | 1.187 | 0.385 | 0.098 | 0.023 | 1939 | 2563 |
| BW1187-CC-105 | 3/8" | 1.187 | 0.385 | 0.105 | 0.022 | 2277 | 3015 |
| BW1187-CC-125 | 3/8" | 1.187 | 0.385 | 0.125 | 0.021 | 3658 | 4856 |
| BW1250-CC-065 | 3/8" | 1.25 | 0.385 | 0.065 | 0.021 | 467 | 613 |
| BW1250-CC-074 | 3/8" | 1.25 | 0.385 | 0.074 | 0.025 | 822 | 1076 |
| BW1250-CC-089 | 3/8" | 1.25 | 0.385 | 0.089 | 0.031 | 1774 | 2322 |
| BW1250-CC-125 | 3/8" | 1.25 | 0.385 | 0.125 | 0.021 | 3283 | 4358 |
| BW0875-DD-031 | 7/16" | 0.875 | 0.446 | 0.031 | 0.03 | 193 | 224 |
| BW0875-DD-045 | 7/16" | 0.875 | 0.446 | 0.045 | 0.024 | 430 | 549 |
| BW0875-DD-059 | 7/16" | 0.875 | 0.446 | 0.059 | 0.025 | 993 | 1288 |
| BW0937-DD-070 | 7/16" | 0.937 | 0.446 | 0.07 | 0.022 | 1211 | 1590 |
| BW1000-DD-049 | 7/16" | 1 | 0.446 | 0.049 | 0.037 | 639 | 782 |
| BW1187-DD-089 | 7/16" | 1.187 | 0.446 | 0.089 | 0.033 | 2160 | 2819 |
| BW1000-EE-035 | 1/2" | 1 | 0.51 | 0.035 | 0.03 | 207 | 247 |
| BW1000-EE-043 | 1/2" | 1 | 0.51 | 0.043 | 0.027 | 335 | 421 |
| BW1000-EE-050 | 1/2" | 1 | 0.51 | 0.05 | 0.027 | 509 | 649 |
| BW1000-EE-062 | 1/2" | 1 | 0.51 | 0.062 | 0.025 | 881 | 1145 |
| BW1000-EE-073 | 1/2" | 1 | 0.51 | 0.073 | 0.02 | 1135 | 1495 |
| BW1063-EE-109 | 1/2" | 1.063 | 0.51 | 0.109 | 0.027 | 4351 | 5747 |
| BW1125-EE-062 | 1/2" | 1.125 | 0.51 | 0.062 | 0.023 | 600 | 784 |
| BW1125-EE-125 | 1/2" | 1.125 | 0.51 | 0.125 | 0.022 | 4629 | 6142 |
| BW1187-EE-089 | 1/2" | 1.187 | 0.51 | 0.089 | 0.029 | 1961 | 2571 |
| BW1250-EE-062 | 1/2" | 1.25 | 0.51 | 0.062 | 0.032 | 665 | 851 |
| BW1250-EE-078 | 1/2" | 1.25 | 0.51 | 0.078 | 0.026 | 1050 | 1376 |
| BW1250-EE-090 | 1/2" | 1.25 | 0.51 | 0.09 | 0.025 | 1543 | 2033 |
| BW1250-EE-125 | 1/2" | 1.25 | 0.51 | 0.125 | 0.02 | 3281 | 4357 |
| BW1312-EE-095 | 1/2" | 1.312 | 0.51 | 0.095 | 0.034 | 2444 | 3199 |
| BW1312-EE-104 | 1/2" | 1.312 | 0.51 | 0.104 | 0.042 | 3632 | 4722 |
| BW1375-EE-087 | 1/2" | 1.375 | 0.51 | 0.087 | 0.035 | 1596 | 2076 |
| BW1375-EE-100 | 1/2" | 1.375 | 0.51 | 0.1 | 0.022 | 1497 | 1981 |
| BW1375-EE-125 | 1/2" | 1.375 | 0.51 | 0.125 | 0.029 | 3858 | 5101 |
| BW1500-EE-047 | 1/2" | 1.5 | 0.51 | 0.047 | 0.045 | 299 | 348 |
| BW1500-EE-070 | 1/2" | 1.5 | 0.51 | 0.07 | 0.035 | 698 | 895 |
| BW1500-EE-080 | 1/2" | 1.5 | 0.51 | 0.08 | 0.02 | 578 | 764 |
| BW1500-EE-095 | 1/2" | 1.5 | 0.51 | 0.095 | 0.032 | 1562 | 2046 |
| BW1500-EE-102 | 1/2" | 1.5 | 0.51 | 0.102 | 0.025 | 1498 | 1978 |
| BW1500-EE-112 | 1/2" | 1.5 | 0.51 | 0.112 | 0.042 | 3372 | 4400 |
| BW1625-EE-140 | 1/2" | 1.625 | 0.51 | 0.14 | 0.03 | 3915 | 5183 |
| BW1875-EE-187 | 1/2" | 1.875 | 0.51 | 0.187 | 0.036 | 8335 | 11049 |
| BW1125-FF-038 | 9/16" | 1.125 | 0.569 | 0.038 | 0.036 | 255 | 298 |
| BW1125-FF-056 | 9/16" | 1.125 | 0.569 | 0.056 | 0.03 | 624 | 796 |
| BW1250-GG-040 | 5/8" | 1.25 | 0.64 | 0.04 | 0.043 | 300 | 339 |
| BW1250-GG-051 | 5/8" | 1.25 | 0.64 | 0.051 | 0.035 | 461 | 572 |
| BW1250-GG-062 | 5/8" | 1.25 | 0.64 | 0.062 | 0.029 | 661 | 852 |
| BW1250-GG-089 | 5/8" | 1.25 | 0.64 | 0.089 | 0.023 | 1515 | 1999 |
| BW1312-GG-098 | 5/8" | 1.312 | 0.64 | 0.098 | 0.03 | 2338 | 3073 |
| BW1375-GG-049 | 5/8" | 1.375 | 0.64 | 0.049 | 0.047 | 459 | 535 |
| BW1375-GG-062 | 5/8" | 1.375 | 0.64 | 0.062 | 0.05 | 953 | 1154 |
| BW1375-GG-078 | 5/8" | 1.375 | 0.64 | 0.078 | 0.033 | 1169 | 1516 |
| BW1500-GG-100 | 5/8" | 1.5 | 0.64 | 0.1 | 0.039 | 2353 | 3064 |
| BW1500-GG-112 | 5/8" | 1.5 | 0.64 | 0.112 | 0.035 | 2942 | 3864 |
| BW1625-GG-140 | 5/8" | 1.625 | 0.64 | 0.14 | 0.03 | 4065 | 5381 |
| BW1750-GG-131 | 5/8" | 1.75 | 0.64 | 0.131 | 0.045 | 4284 | 5609 |
| BW1750-GG-140 | 5/8" | 1.75 | 0.64 | 0.14 | 0.042 | 4860 | 6390 |
| BW1750-GG-187 | 5/8" | 1.75 | 0.64 | 0.187 | 0.03 | 8190 | 10876 |
| BW1875-GG-057 | 5/8" | 1.875 | 0.64 | 0.057 | 0.06 | 467 | 531 |
| BW1875-GG-086 | 5/8" | 1.875 | 0.64 | 0.086 | 0.045 | 1069 | 1367 |
| BW1875-GG-127 | 5/8" | 1.875 | 0.64 | 0.127 | 0.033 | 2446 | 3228 |
| BW2000-GG-150 | 5/8" | 2 | 0.64 | 0.15 | 0.057 | 6144 | 8011 |
| BW1375-HH-067 | 11/16" | 1.375 | 0.695 | 0.067 | 0.035 | 832 | 1064 |
| BW1375-HH-140 | 11/16" | 1.375 | 0.695 | 0.14 | 0.052 | 11052 | 14426 |
| BW1500-II-045 | 3/4" | 1.5 | 0.76 | 0.045 | 0.05 | 347 | 388 |
| BW1500-II-060 | 3/4" | 1.5 | 0.76 | 0.06 | 0.043 | 640 | 790 |
| BW1500-II-072 | 3/4" | 1.5 | 0.76 | 0.072 | 0.036 | 891 | 1143 |
| BW1500-II-098 | 3/4" | 1.5 | 0.76 | 0.098 | 0.034 | 2080 | 2722 |
| BW1500-II-112 | 3/4" | 1.5 | 0.76 | 0.112 | 0.035 | 315 | 4183 |
| BW1500-II-125 | 3/4" | 1.5 | 0.76 | 0.125 | 0.036 | 4544 | 5982 |
| BW1750-II-140 | 3/4" | 1.75 | 0.76 | 0.14 | 0.045 | 5466 | 7173 |
| BW2000-II-150 | 3/4" | 2 | 0.76 | 0.15 | 0.055 | 6082 | 7942 |
| BW2250-II-068 | 3/4" | 2.25 | 0.76 | 0.068 | 0.07 | 637 | 729 |
| BW2250-II-156 | 3/4" | 2.25 | 0.76 | 0.156 | 0.047 | 4494 | 5908 |
| BW2250-II-168 | 3/4" | 2.25 | 0.76 | 0.168 | 0.063 | 7581 | 9891 |
| BW3000-II-312 | 3/4" | 3 | 0.76 | 0.312 | 0.042 | 17582 | 23377 |
| BW1750-JJ-057 | 7/8" | 1.75 | 0.89 | 0.057 | 0.058 | 586 | 673 |
| BW1750-JJ-085 | 7/8" | 1.75 | 0.89 | 0.085 | 0.045 | 1355 | 1731 |
| BW1750-JJ-131 | 7/8" | 1.75 | 0.89 | 0.131 | 0.038 | 4067 | 5352 |
| BW2000-JJ-150 | 7/8" | 2 | 0.89 | 0.15 | 0.042 | 4830 | 6363 |
| BW2250-JJ-168 | 7/8" | 2.25 | 0.89 | 0.168 | 0.063 | 7816 | 10197 |
| BW2000-KK-065 | 1" | 2 | 1.02 | 0.065 | 0.067 | 773 | 884 |
| BW2000-KK-078 | 1" | 2 | 1.02 | 0.078 | 0.06 | 1121 | 1368 |
| BW2000-KK-084 | 1" | 2 | 1.02 | 0.084 | 0.053 | 1202 | 1509 |
| BW2000-KK-097 | 1" | 2 | 1.02 | 0.097 | 0.05 | 1713 | 2193 |
| BW2000-KK-120 | 1" | 2 | 1.02 | 0.12 | 0.045 | 2864 | 3736 |
| BW2000-KK-142 | 1" | 2 | 1.02 | 0.142 | 0.036 | 3752 | 4953 |
| BW2000-KK-156 | 1" | 2 | 1.02 | 0.156 | 0.043 | 5952 | 7843 |
| BW2250-KK-168 | 1" | 2.25 | 1.02 | 0.168 | 0.055 | 7106 | 9319 |
| BW2500-KK-156 | 1" | 2.5 | 1.02 | 0.156 | 0.048 | 3868 | 5082 |
| BW2500-KK-187 | 1" | 2.5 | 1.02 | 0.187 | 0.061 | 8482 | 11124 |
| BW3000-KK-312 | 1" | 3 | 1.02 | 0.312 | 0.072 | 30827 | 40764 |
| BW4000-KK-312 | 1" | 4 | 1.02 | 0.312 | 0.062 | 14647 | 19410 |
| BW2250-LL-073 | 1-1/8" | 2.25 | 1.14 | 0.073 | 0.074 | 947 | 1088 |
| BW2250-LL-111 | 1-1/8" | 2.25 | 1.14 | 0.111 | 0.055 | 2215 | 2844 |
| BW2250-LL-159 | 1-1/8" | 2.25 | 1.14 | 0.159 | 0.04 | 4605 | 6079 |
| BW2250-LL-168 | 1-1/8" | 2.25 | 1.14 | 0.168 | 0.05 | 6816 | 8964 |
| BW2500-LL-187 | 1-1/8" | 2.5 | 1.14 | 0.187 | 0.058 | 8378 | 11005 |
| BW3000-LL-312 | 1-1/8" | 3 | 1.14 | 0.312 | 0.072 | 31447 | 41583 |
| BW4000-LL-312 | 1-1/8" | 4 | 1.14 | 0.312 | 0.072 | 17079 | 22584 |
| BW2250-MM-219 | 1-1/4" | 2.25 | 1.265 | 0.219 | 0.035 | 11282 | 14983 |
| BW2500-MM-120 | 1-1/4" | 2.5 | 1.265 | 0.12 | 0.062 | 2562 | 3279 |
| BW2500-MM-175 | 1-1/4" | 2.5 | 1.265 | 0.175 | 0.045 | 5593 | 7380 |
| BW2500-MM-187 | 1-1/4" | 2.5 | 1.265 | 0.187 | 0.055 | 8366 | 11006 |
| BW2750-MM-206 | 1-1/4" | 2.75 | 1.265 | 0.206 | 0.06 | 9595 | 12626 |
| BW4000-MM-312 | 1-1/4" | 4 | 1.265 | 0.312 | 0.072 | 17196 | 22739 |
| BW3250-NN-244 | 1-3/8" | 3.25 | 1.39 | 0.244 | 0.075 | 13890 | 18250 |
| BW2750-OO-219 | 1-1/2" | 2.75 | 1.53 | 0.219 | 0.034 | 7271 | 9658 |
| BW3000-OO-093 | 1-1/2" | 3 | 1.53 | 0.093 | 0.094 | 1404 | 1615 |
| BW3000-OO-143 | 1-1/2" | 3 | 1.53 | 0.143 | 0.072 | 3506 | 4496 |
| BW3000-OO-225 | 1-1/2" | 3 | 1.53 | 0.225 | 0.062 | 11445 | 15081 |
| BW4000-OO-312 | 1-1/2" | 4 | 1.53 | 0.312 | 0.072 | 17715 | 23425 |
| BW3250-PP-244 | 1-5/8" | 3.25 | 1.635 | 0.244 | 0.072 | 14348 | 18874 |