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Imperial Size Guide | BS309 - BS395

Our O-rings are available in various different polymers, including Nitrile, Viton ® , Silicone. Other can be made on special request.

Article No. O-Ring Size
 ID x C/S (mm)
Nominal  Size (reference only)
(All dimensions are in inches)
ID OD C/S
BS309 10.47 x 5.33 7/16 13/16 3/16
BS310 12.07 x 5.33 1/2 7/8 3/16
BS311 13.64 x 5.33 9/16 15/16 3/16
BS312 15.24 x 5.33 5/8 1 3/16
BS313 16.82 x 5.33 11/16 1 1/16 3/16
BS314 18.42 x 5.33 3/4 1 1/8 3/16
BS315 19.99 x 5.33 13/16 1 3/16 3/16
BS316 21.59 x 5.33 7/8 1 1/4 3/16
BS317 23.17 x 5.33 15/16 1 5/16 3/16
BS318 24.77 x 5.33 1 1 3/8 3/16
BS319 26.34 x 5.33 1 1/16 1 7/16 3/16
BS320 27.94 x 5.33 1 1/8 1 1/2 3/16
BS321 29.52 x 5.33 1 3/16 1 9/16 3/16
BS322 31.12 x 5.33 1 1/4 1 5/8 3/16
BS323 32.69 x 5.33 1 5/16 1 11/16 3/16
BS324 34.29 x 5.33 1 3/8 1 3/4 3/16
BS325 37.47 x 5.33 1 1/2 1 7/8 3/16
BS326 40.64 x 5.33 1 5/8 2 3/16
BS327 43.82 x 5.33 1 3/4 2 1/8 3/16
BS328 46.99 x 5.33 1 7/8 2 1/4 3/16
BS329 50.17 x 5.33 2 2 3/8 3/16
BS330 53.34 x 5.33 2 1/8 2 1/2 3/16
BS331 56.52 x 5.33 2 1/4 2 5/8 3/16
BS332 59.69 x 5.33 2 3/8 2 3/4 3/16
BS333 62.87 x 5.33 2 1/2 2 7/8 3/16
BS334 66.64 x 5.33 2 5/8 3 3/16
BS335 69.22 x 5.33 2 3/4 3 1/8 3/16
BS336 72.39 x 5.33   2 7/8 3 1/4 3/16
BS337 75.57 x 5.33 3 3 3/8 3/16
BS338 78.74 x 5.33 3 1/8 3 1/2 3/16
BS339 81.92 x 5.33 3 1/4 3 5/8 3/16
BS340 85.09 x 5.33 3 3/8 3 3/4 3/16
BS341 88.27 x 5.33 3 1/2 3 7/8 3/16
BS342 91.44 x 5.33 3 5/8 4 3/16
BS343 94.62 x 5.33 3 3/4 4 1/8 3/16
BS344 97.79 x 5.33 3 7/8 4 1/4 3/16
BS345 100.97 x 5.33 4 4 3/8 3/16
BS346 104.14 x 5.33 4 1/8 4 1/2 3/16
BS347 107.32 x 5.33 4 1/4 4 5/8 3/16
BS348 110.49 x 5.33 4 3/8 4 3/4 3/16
BS349 113.67 x 5.33 4 1/2 4 7/8 3/16
BS350 116.84 x 5.33 4 5/8 5 3/16
BS351 120.02 x 5.33 4 3/4 5 1/8 3/16
BS352 123.19 x 5.33   4 7/8 5 1/4 3/16
BS353 126.37 x 5.33 5 5 3/8 3/16
BS354 129.54 x 5.33 5 1/8 5 1/2 3/16
BS355 132.72 x 5.33 5 1/4 5 5/8 3/16
BS356 135.89 x 5.33 5 3/8 5 3/4 3/16
BS357 139.07 x 5.33 5 1/2 5 7/8 3/16
BS358 142.24 x 5.33 5 5/8 6 3/16
BS359 145.42 x 5.33 5 3/4 6 1/8 3/16
BS360 148.59 x 5.33 5 7/8 6 1/4 3/16
BS361 151.77 x 5.33 6 6 3/8 3/16
BS362 158.12 x 5.33 6 1/4 6 5/8 3/16
BS363 164.47 x 5.33 6 1/2 6 7/8 3/16
BS364 170.82 x 5.33 4 3/4 7 1/8 3/16
BS365 177.17 x 5.33 7 7 3/8 3/16
BS366 183.52 x 5.33 7 1/4 7 5/8 3/16
BS367 189.87 x 5.33 7 1/2 7 7/8 3/16
BS368 196.22 x 5.33 7 3/4 8 1/8 3/16
BS369 202.57 x 5.33 8 8 3/8 3/16
BS370 208.92 x 5.33 8 1/4 8 5/8 3/16
BS371 215.27 x 5.33 8 1/2 8 7/8 3/16
BS372 221.62 x 5.33 8 3/4 9 1/8 3/16
BS373 227.97 x 5.33 9 9 3/8 3/16
BS374 234.32 x 5.33 9 1/4 9 5/8 3/16
BS375 240.67 x 5.33 9 1/2 9 7/8 3/16
BS376 247.02 x 5.33 9 3/4 10 1/8 3/16
BS377 253.37 x 5.33 10 10 3/8 3/16
BS378 266.07 x 5.33 10 1/2 10 7/8 3/16
BS379 278.77 x 5.33 11 11 3/8 3/16
BS380 291.47 x 5.33 11 1/2 11 7/8 3/16
BS381 304.17 x 5.33 12 12 3/8 3/16
BS382 329.57 x 5.33 13 13 3/8 3/16
BS383 354.97 x 5.33 14 14 3/8 3/16
BS384 380.37 x 5.33 15 15 3/8 3/16
BS385 405.26 x 5.33 16 16 3/8 3/16
BS386 430.66 x 5.33 17 17 3/8 3/16
BS387 456.06 x 5.33 18 18 3/8 3/16
BS388 481.38 x 5.33 19 19 3/8 3/16
BS389 506.78 x 5.33 20 20 3/8 3/16
BS390 532.18 x 5.33 21 21 3/8 3/16
BS391 557.58 x 5.33 22 22 3/8 3/16
BS392 582.68 x 5.33 23 23 3/8 3/16
BS393 608.08 x 5.33 24 24 3/8 3/16
BS394 633.48 x 5.33 25 25 3/8 3/16
BS395 658.88 x 5.33 26 26 3/8 3/16