O-Ring Sizes
O-Ring sizes and dimensions BS1806 - AS568A |
---|
Materials | ||
---|---|---|
NBR | FKM/VIT | EPDM |
HNBR | FFKM | Neoprene |
PTFE | Silicone | Fluorosilicone |
Other materials are available on request
1/8" cross section | ||||||
---|---|---|---|---|---|---|
3.53mm ± 0.10mm 0.139"± 0.004" | ||||||
Internal diameter | Nominal size | |||||
Part No. (BS) | mm | Tol ± | Inch | Tol ± | Shaft | Bore |
201 | 4.34 | 0.13 | 0.171 | 0.005 | 3/16 | 7/16 |
202 | 5.94 | 0.13 | 0.234 | 0.005 | 1/4 | 1/2 |
203 | 7.52 | 0.13 | 0.296 | 0.005 | 5/16 | 9/16 |
204 | 9.12 | 0.13 | 0.359 | 0.005 | 3/8 | 5/8 |
205 | 10.69 | 0.13 | 0.421 | 0.005 | 7/16 | 11/16 |
206 | 12.29 | 0.13 | 0.484 | 0.005 | 1/2 | 3/4 |
207 | 13.87 | 0.13 | 0.546 | 0.005 | 9/16 | 13/16 |
208 | 15.47 | 0.13 | 0.609 | 0.005 | 5/8 | 7/8 |
209 | 17.04 | 0.13 | 0.671 | 0.005 | 11/16 | 15/16 |
210 | 18.64 | 0.15 | 0.734 | 0.006 | 3/4 | 1 |
211 | 20.22 | 0.15 | 0.796 | 0.006 | 13/16 | 1.1/16 |
212 | 21.82 | 0.15 | 0.859 | 0.006 | 7/8 | 1.1/8 |
213 | 23.40 | 0.15 | 0.921 | 0.006 | 15/16 | 1.3/16 |
214 | 24.99 | 0.15 | 0.984 | 0.006 | 1 | 1.1/4 |
618 | 25.80 | 0.15 | 1.016 | 0.006 | 1.1/64 | - |
215 | 26.58 | 0.15 | 1.046 | 0.006 | 1.1/16 | 1.5/16 |
216 | 28.17 | 0.15 | 1.109 | 0.006 | 1.1/8 | 1.3/8 |
217 | 29.75 | 0.15 | 1.171 | 0.006 | 1.3/16 | 1.7/16 |
218 | 31.34 | 0.15 | 1.234 | 0.006 | 1.1/4 | 1.1/2 |
219 | 32.92 | 0.15 | 1.296 | 0.006 | 1.5/16 | 1.9/16 |
220 | 34.52 | 0.15 | 1.359 | 0.006 | 1.3/8 | 1.5/8 |
221 | 36.10 | 0.15 | 1.421 | 0.006 | 1.7/16 | 1.11/16 |
222 | 37.69 | 0.15 | 1.484 | 0.006 | 1.1/2 | 1.3/4 |
824 | 39.69 | 0.25 | 1.563 | 0.010 | 1.9/16 | 1.13/16 |
223 | 40.87 | 0.25 | 1.609 | 0.010 | 1.5/8 | 1.7/8 |
825 | 41.28 | 0.25 | 1.625 | 0.010 | 1.5/8 | - |
826 | 42.86 | 0.25 | 1.687 | 0.010 | 1.11/16 | 1.15/16 |
224 | 44.04 | 0.25 | 1.734 | 0.010 | 1.3/4 | 2 |
827 | 44.45 | 0.25 | 1.750 | 0.010 | - | - |
828 | 46.04 | 0.25 | 1.812 | 0.010 | 1.13/16 | 2.1/16 |
225 | 47.22 | 0.25 | 1.859 | 0.010 | 1.7/8 | 2.1/8 |
829 | 47.63 | 0.25 | 1.875 | 0.010 | - | - |
830 | 49.21 | 0.25 | 1.937 | 0.010 | 1.15/16 | 2.3/16 |
226 | 50.40 | 0.25 | 1.984 | 0.010 | 2 | 2.1/4 |
831 | 50.80 | 0.25 | 2.000 | 0.010 | - | - |
832 | 52.39 | 0.25 | 2.063 | 0.010 | 2.1/16 | 2.1/8 |
227 | 53.57 | 0.25 | 2.109 | 0.010 | 2.1/8 | 2.3/8 |
833 | 53.98 | 0.25 | 2.125 | 0.010 | - | - |
834 | 55.56 | 0.25 | 2.187 | 0.010 | 2.3/16 | 2.7/16 |
228 | 56.74 | 0.25 | 2.234 | 0.010 | 2.1/4 | 2.1/2 |
835 | 57.12 | 0.25 | 2.250 | 0.010 | - | - |
836 | 58.74 | 0.25 | 2.312 | 0.010 | 2.5/16 | 2.9/16 |
229 | 59.92 | 0.25 | 2.359 | 0.010 | 2.3/8 | 2.5/8 |
837 | 60.33 | 0.25 | 2.375 | 0.010 | 2.3/8 | - |
838 | 61.90 | 0.25 | 2.437 | 0.010 | 2.7/16 | 2.11/16 |
230 | 63.09 | 0.25 | 2.484 | 0.010 | 2.1/2 | 2.3/4 |
839 | 63.50 | 0.25 | 2.500 | 0.010 | - | - |
840 | 65.10 | 0.25 | 2.563 | 0.010 | 2.9/16 | 2.13/16 |
231 | 66.27 | 0.25 | 2.609 | 0.010 | 2.5/8 | 2.7/8 |
841 | 66.67 | 0.38 | 2.625 | 0.015 | - | - |
842 | 68.26 | 0.38 | 2.687 | 0.015 | 2.11/16 | 2.15/16 |
232 | 69.44 | 0.38 | 2.734 | 0.015 | 2.3/4 | 3 |
843 | 69.85 | 0.38 | 2.750 | 0.015 | 2.13/16 | - |
844 | 71.44 | 0.38 | 2.812 | 0.015 | - | - |
1/8" cross section | ||||||
---|---|---|---|---|---|---|
3.53mm ± 0.10mm 0.139"± 0.004" | ||||||
Internal diameter | Nominal size | |||||
Part No. (BS) | mm | Tol ± | Inch | Tol ± | Shaft | Bore |
233 | 72.62 | 0.38 | 2.859 | 0.015 | 2.7/8 | 3.1/8 |
845 | 73.02 | 0.38 | 2.875 | 0.015 | - | - |
846 | 74.60 | 0.38 | 2.937 | 0.015 | 2.15/16 | 3.3/16 |
234 | 75.80 | 0.38 | 2.984 | 0.015 | 3 | 3.1/4 |
235 | 78.97 | 0.38 | 3.109 | 0.015 | 3.1/8 | 3.3/8 |
236 | 82.14 | 0.38 | 3.234 | 0.015 | 3.1/4 | 3.1/2 |
237 | 85.32 | 0.38 | 3.359 | 0.015 | 3.3/8 | 3.5/8 |
238 | 88.50 | 0.38 | 3.484 | 0.015 | 3.1/2 | 3.3/4 |
239 | 91.67 | 0.38 | 3.609 | 0.015 | 3.5/8 | 3.7/8 |
240 | 94.84 | 0.38 | 3.734 | 0.015 | 3.3/4 | 4 |
241 | 98.02 | 0.38 | 3.859 | 0.015 | 3.7/8 | 4.1/8 |
242 | 101.20 | 0.38 | 3.984 | 0.015 | 4 | 4.1/4 |
243 | 104.37 | 0.38 | 4.109 | 0.015 | 4.1/8 | 4.3/8 |
244 | 107.54 | 0.38 | 4.234 | 0.015 | 4.1/4 | 4.1/2 |
245 | 110.72 | 0.38 | 4.359 | 0.015 | 4.3/8 | 4.5/8 |
246 | 113.90 | 0.38 | 4.484 | 0.015 | 4.1/2 | 4.3/4 |
247 | 117.07 | 0.38 | 4.609 | 0.015 | 4.5/8 | 4.7/8 |
248 | 120.25 | 0.38 | 4.734 | 0.015 | 4.3/4 | 5 |
249 | 123.42 | 0.38 | 4.859 | 0.015 | 4.7/8 | 5.1/8 |
250 | 126.60 | 0.38 | 4.984 | 0.015 | 5 | 5.1/4 |
251 | 129.77 | 0.58 | 5.108 | 0.023 | 5.1/8 | 5.3/8 |
252 | 132.94 | 0.58 | 5.234 | 0.023 | 5.1/4 | 5.1/2 |
253 | 136.12 | 0.58 | 5.359 | 0.023 | 5.3/8 | 5.5/8 |
254 | 139.30 | 0.58 | 5.484 | 0.023 | 5.1/2 | 5.3/4 |
255 | 142.47 | 0.58 | 5.609 | 0.023 | 5.5/8 | 5.7/8 |
256 | 145.65 | 0.58 | 5.734 | 0.023 | 5.3/4 | 6 |
257 | 148.82 | 0.58 | 5.859 | 0.023 | 5.7/8 | 6.1/8 |
258 | 151.99 | 0.58 | 5.984 | 0.023 | 6 | 6.1/4 |
259 | 158.35 | 0.58 | 6.234 | 0.023 | 6.1/4 | 6.1/2 |
260 | 164.70 | 0.58 | 6.484 | 0.023 | 6.1/2 | 6.3/4 |
261 | 171.05 | 0.58 | 6.734 | 0.023 | 6.3/4 | 7 |
262 | 177.40 | 0.58 | 6.984 | 0.023 | 7 | 7.1/4 |
263 | 183.75 | 0.76 | 7.234 | 0.030 | 7.1/4 | 7.1/2 |
264 | 190.10 | 0.76 | 7.484 | 0.030 | 7.1/2 | 7.3/4 |
265 | 196.44 | 0.76 | 7.734 | 0.030 | 7.3/4 | 8 |
266 | 202.79 | 0.76 | 7.984 | 0.030 | 8 | 8.1/4 |
267 | 209.14 | 0.76 | 8.234 | 0.030 | 8.1/4 | 8.1/2 |
268 | 215.49 | 0.76 | 8.484 | 0.030 | 8.1/2 | 8.3/4 |
269 | 221.84 | 0.76 | 8.734 | 0.030 | 8.3/4 | 9 |
270 | 228.19 | 0.76 | 8.984 | 0.030 | 9 | 9.1/4 |
271 | 234.54 | 0.76 | 9.234 | 0.030 | 9.1/4 | 9.1/2 |
272 | 240.89 | 0.76 | 9.484 | 0.030 | 9.1/2 | 9.3/4 |
273 | 247.24 | 0.76 | 9.734 | 0.030 | 9.3/4 | 10 |
274 | 253.59 | 0.76 | 9.984 | 0.030 | 10 | 10.1/4 |
275 | 266.30 | 0.76 | 10.484 | 0.030 | 10.1/2 | 10.3/4 |
276 | 279.00 | 0.76 | 10.984 | 0.030 | 11 | 11.1/4 |
277 | 291.70 | 0.76 | 11.484 | 0.030 | 11.1/2 | 11.3/4 |
278 | 304.39 | 0.76 | 11.984 | 0.030 | 12 | 12.1/4 |
279 | 329.80 | 0.76 | 12.984 | 0.030 | 13 | 13.1/4 |
280 | 355.20 | 0.76 | 13.984 | 0.030 | 14 | 14.1/4 |
281 | 380.60 | 0.76 | 14.984 | 0.030 | 15 | 15.1/4 |
282 | 405.26 | 1.14 | 15.955 | 0.030 | 16 | 16.1/4 |
283 | 430.66 | 1.14 | 16.955 | 0.030 | 17 | 17.1/4 |
284 | 456.06 | 1.14 | 17.955 | 0.030 | 18 | 18.1/4 |