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Imperial Size Guide | BS201 - BS284

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
BS201 4.34 x 3.53 3/16 7/16 1/8
BS202 5.94 x 3.53 1/4 1/2 1/8
BS203 7.52 x 3.53 5/16 9/16 1/8
BS204 9.12 x 3.53 3/8 5/8 1/8
BS205 10.69 x 3.53 7/16 11/16 1/8
BS206 12.29 x 3.53 1/2 3/4 1/8
BS207 13.87 x 3.53 9/16 13/16 1/8
BS208 15.47 x 3.53 5/8 7/8 1/8
BS209 17.04 x 3.53 11/16 15/16 1/8
BS210 18.64 x 3.53 3/4 1 1/8
BS211 20.22 x 3.53 13/16 1 1/16 1/8
BS212 21.82 x 3.53 7/8   1 1/8 1/8
BS213 23.39 x 3.53 15/16 1 3/16 1/8
BS214 24.99 x 3.53 1 1 1/4 1/8
BS215 26.57 x 3.53 1   1/16 1 5/16 1/8
BS216 28.17 x 3.53 1 1/8 1 3/8 1/8
BS217 29.74 x 3.53 1 3/16 1 7/16 1/8
BS218 31.34 x 3.53 1 1/4 1 1/2 1/8
BS219 32.92 x 3.53 1 5/16 1 9/16 1/8
BS220 34.52 x 3.53 1 3/8 1 5/8 1/8
BS221 36.09 x 3.53 1 7/16 1 11/16 1/8
BS222 37.69 x 3.53 1 1/2 1 3/4 1/8
BS223 40.87 x 3.53 1 5/8 1 7/8 1/8
BS224 44.09 x 3.53 1 3/4 2 1/8
BS225 47.22 x 3.53 1 7/8 2 1/8 1/8
BS226 50.39 x 3.53 2 2 1/4 1/8
BS227 53.57 x 3.53 2 1/8 2 3/8 1/8
BS228 56.75 x 3.53 2 1/4 2 1/2 1/8
BS229 59.92 x 3.53 2 3/8 2 5/8 1/8
BS230 63.09 x 3.53 2 1/2 2 3/4 1/8
BS231 66.27 x 3.53 2 5/8 2 7/8 1/8
BS232 69.44 x 3.53 2 3/4 3 1/8
BS233 72.62 x 3.53   2 7/8 3 1/8 1/8
BS234 75.80 x 3.53 3 3 1/4 1/8
BS235 78.97 x 3.53 3 1/8 3 3/8 1/8
BS236 82.14 x 3.53 3 1/4 3 1/2 1/8
BS237 85.32 x 3.53 3 3/8 3 5/8 1/8
BS238 88.49 x 3.53 3 1/2 3 3/4 1/8
BS239 91.67 x 3.53 3 5/8 3 7/8 1/8
BS240 94.84 x 3.53 3 3/4 4 1/8
BS241 98.02 x 3.53   3 7/8 4 1/8 1/8
BS242 101.20 x 3.53 4 4 1/4 1/8
BS243 104.37 x 3.53 4 1/8 4 3/8 1/8
BS244 107.54 x 3.53 4 1/4 4 1/2 1/8
BS245 110.72 x 3.53 4 3/8 4 5/8 1/8
BS246 113.89 x 3.53 4 1/2 4 3/4 1/8
BS247 117.07 x 3.53 4 5/8 4 7/8 1/8
BS248 120.24 x 3.53 4 3/4 5 1/8
BS249 123.42 x 3.53 4 7/8 5 1/8 1/8
BS250 126.60 x 3.53 5 5 1/4 1/8
BS251 129.77 x 3.53 5 1/8 5 3/8 1/8
BS252 132.95 x 3.53 5 1/4 5 1/2 1/8
BS253 136.12 x 3.53 5 3/8 5 5/8 1/8
BS254 139.30 x 3.53 5 1/2 5 3/4 1/8
BS255 142.47 x 3.53 5 5/8 5 7/8 1/8
BS256 145.64 x 3.53 5 3/4 6 1/8
BS257 148.82 x 3.53   5 7/8 6 1/8 1/8
BS258 152.0 x 3.53 6 6 1/4 1/8
BS259 158.34 x 3.53 6 1/4 6 1/2 1/8
BS260 164.70 x 3.53 6 1/2 6 3/4 1/8
BS261 171.04 x 3.53 4 3/4 7 1/8
BS262 177.40 x 3.53 7 7 1/4 1/8
BS263 183.74 x 3.53 7 1/4 7 1/2 1/8
BS264 190.10 x 3.53 7 1/2 7 3/4 1/8
BS265 196.44 x 3.53 7 3/4 8 1/8
BS266 202.80 x 3.53 8 7 1/4 1/8
BS267 209.14 x 3.53 8 1/4 7 1/2 1/8
BS268 215.50 x 3.53 8 1/2 7 3/4 1/8
BS269 221.84 x 3.53 8 3/4 9 1/8
BS270 228.20 x 3.53 9 7 1/4 1/8
BS271 234.55 x 3.53 9 1/4 7 1/2 1/8
BS272 240.90 x 3.53 9 1/2 7 3/4 1/8
BS273 247.25 x 3.53 9 3/4 10 1/8
BS274 253.60 x 3.53 10 10 1/4 1/8
BS275 266.29 x 3.53 10 1/2 10 3/4 1/8
BS276 278.99 x 3.53 11 11 1/4 1/8
BS277 291.69 x 3.53 11 1/2 11 3/4 1/8
BS278 304.39 x 3.53 12 12 1/4 1/8
BS279 329.79 x 3.53 13 13 1/4 1/8
BS280 355.19 x 3.53 14 14 1/4 1/8
BS281 380.59 x 3.53 15 15 1/4 1/8
BS282 405.26 x 3.53 16 16 1/4 1/8
BS283 430.66 x 3.53 17 17 1/4 1/8
BS284 456.06 x 3.53 18 18 1/4 1/8