| |
BS 3 Series O-Ring Size Charts
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|
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|
|
|
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|
BS 3xx Series
|
|
Nominal Size
|
Actual Size
|
|
BS
|
Inches
|
Inches
|
Millimetres
|
|
No
|
I.D.
|
W
|
I.D.
|
±
|
W
|
±
|
I.D.
|
±
|
W
|
±
|
|
309
|
7/16
|
3/16
|
0.412
|
0.005
|
0.210
|
0.005
|
10.46
|
0.12
|
5.34
|
0.12
|
|
310
|
1/2
|
3/16
|
0.475
|
0.005
|
0.210
|
0.005
|
12.07
|
0.12
|
5.34
|
0.12
|
|
311
|
9/16
|
3/16
|
0.537
|
0.005
|
0.210
|
0.005
|
13.64
|
0.12
|
5.34
|
0.12
|
|
312
|
5/8
|
3/16
|
0.600
|
0.005
|
0.210
|
0.005
|
15.24
|
0.12
|
5.34
|
0.12
|
|
313
|
11/16
|
3/16
|
0.662
|
0.005
|
0.210
|
0.005
|
16.81
|
0.12
|
5.34
|
0.12
|
|
314
|
3/4
|
3/16
|
0.725
|
0.006
|
0.210
|
0.005
|
18.42
|
0.15
|
5.34
|
0.12
|
|
315
|
13/16
|
3/16
|
0.787
|
0.006
|
0.210
|
0.005
|
19.99
|
0.15
|
5.34
|
0.12
|
|
316
|
7/8
|
3/16
|
0.850
|
0.006
|
0.210
|
0.005
|
21.59
|
0.15
|
5.34
|
0.12
|
|
317
|
15/16
|
3/16
|
0.912
|
0.006
|
0.210
|
0.005
|
23.16
|
0.15
|
5.34
|
0.12
|
|
318
|
1
|
3/16
|
0.975
|
0.006
|
0.210
|
0.005
|
24.77
|
0.15
|
5.34
|
0.12
|
|
319
|
1 1/16
|
3/16
|
1.037
|
0.006
|
0.210
|
0.005
|
26.34
|
0.15
|
5.34
|
0.12
|
|
320
|
1 1/8
|
3/16
|
1.100
|
0.006
|
0.210
|
0.005
|
27.941
|
0.15
|
5.34
|
0.12
|
|
321
|
1 3/16
|
3/16
|
1.162
|
0.006
|
0.210
|
0.005
|
29.51
|
0.15
|
5.34
|
0.12
|
|
322
|
1 1/4
|
3/16
|
1.225
|
0.006
|
0.210
|
0.005
|
31.12
|
0.15
|
5.34
|
0.12
|
|
323
|
1 5/16
|
3/16
|
1.287
|
0.006
|
0.210
|
0.005
|
32.69
|
0.15
|
5.34
|
0.12
|
|
324
|
1 3/8
|
3/16
|
1.350
|
0.006
|
0.210
|
0.005
|
34.29
|
0.15
|
5.34
|
0.12
|
|
325
|
1 1/2
|
3/16
|
1.475
|
0.010
|
0.210
|
0.005
|
37.47
|
0.25
|
5.34
|
0.12
|
|
326
|
1 5/8
|
3/16
|
1.600
|
0.010
|
0.210
|
0.005
|
40.65
|
0.25
|
5.34
|
0.12
|
|
327
|
1 3/4
|
3/16
|
1.725
|
0.010
|
0.210
|
0.005
|
43.82
|
0.25
|
5.34
|
0.12
|
|
328
|
1 7/8
|
3/16
|
1.850
|
0.010
|
0.210
|
0.005
|
46.99
|
0.25
|
5.34
|
0.12
|
|
329
|
2
|
3/16
|
1.975
|
0.010
|
0.210
|
0.005
|
50.16
|
0.25
|
5.34
|
0.12
|
|
330
|
2 1/8
|
3/16
|
2.100
|
0.010
|
0.210
|
0.005
|
53.34
|
0.25
|
5.34
|
0.12
|
|
331
|
2 1/4
|
3/16
|
2.225
|
0.010
|
0.210
|
0.005
|
56.52
|
0.25
|
5.34
|
0.12
|
|
332
|
2 3/8
|
3/16
|
2.350
|
0.010
|
0.210
|
0.005
|
59.69
|
0.25
|
5.34
|
0.12
|
|
333
|
2 1/2
|
3/16
|
2.475
|
0.010
|
0.210
|
0.005
|
62.87
|
0.25
|
5.34
|
0.12
|
|
334
|
2 5/8
|
3/16
|
2.600
|
0.010
|
0.210
|
0.005
|
66.04
|
0.25
|
5.34
|
0.12
|
|
335
|
2 3/4
|
3/16
|
2.725
|
0.015
|
0.210
|
0.005
|
69.22
|
0.38
|
5.34
|
0.12
|
|
336
|
2 7/8
|
3/16
|
2.850
|
0.015
|
0.210
|
0.005
|
72.39
|
0.38
|
5.34
|
0.12
|
|
337
|
3
|
3/16
|
2.975
|
0.015
|
0.210
|
0.005
|
75.57
|
0.38
|
5.34
|
0.12
|
|
338
|
3 1/8
|
3/16
|
3.100
|
0.015
|
0.210
|
0.005
|
78.74
|
0.38
|
5.34
|
0.12
|
|
339
|
3 1/4
|
3/16
|
3.225
|
0.015
|
0.210
|
0.005
|
81.92
|
0.38
|
5.34
|
0.12
|
|
340
|
3 3/8
|
3/16
|
3.350
|
0.015
|
0.210
|
0.005
|
85.09
|
0.38
|
5.34
|
0.12
|
|
341
|
3 1/2
|
3/16
|
3.475
|
0.015
|
0.210
|
0.005
|
88.27
|
0.38
|
5.34
|
0.12
|
|
342
|
3 5/8
|
3/16
|
3.600
|
0.015
|
0.210
|
0.005
|
91.44
|
0.38
|
5.34
|
0.12
|
|
343
|
3 3/4
|
3/16
|
3.725
|
0.015
|
0.210
|
0.005
|
94.62
|
0.38
|
5.34
|
0.12
|
|
344
|
3 7/8
|
3/16
|
3.850
|
0.015
|
0.210
|
0.005
|
97.79
|
0.38
|
5.34
|
0.12
|
|
345
|
4
|
3/16
|
3.975
|
0.015
|
0.210
|
0.005
|
100.96
|
0.38
|
5.34
|
0.12
|
|
346
|
4 1/8
|
3/16
|
4.100
|
0.015
|
0.210
|
0.005
|
104.14
|
0.38
|
5.34
|
0.12
|
|
347
|
4 1/4
|
3/16
|
4.225
|
0.015
|
0.210
|
0.005
|
107.32
|
0.38
|
5.34
|
0.12
|
|
348
|
4 3/8
|
3/16
|
4.350
|
0.015
|
0.210
|
0.005
|
110.49
|
0.38
|
5.34
|
0.12
|
|
349
|
4 1/2
|
3/16
|
4.475
|
0.015
|
0.210
|
0.005
|
113.67
|
0.38
|
5.34
|
0.12
|
|
350
|
4 5/8
|
3/16
|
4.600
|
0.015
|
0.210
|
0.005
|
116.84
|
0.38
|
5.34
|
0.12
|
|
351
|
4 3/4
|
3/16
|
4.725
|
0.015
|
0.210
|
0.005
|
120.02
|
0.38
|
5.34
|
0.12
|
|
352
|
4 7/8
|
3/16
|
4.850
|
0.015
|
0.210
|
0.005
|
123.19
|
0.38
|
5.34
|
0.12
|
|
353
|
5
|
3/16
|
4.975
|
0.015
|
0.210
|
0.005
|
126.37
|
0.38
|
5.34
|
0.12
|
|
354
|
5 1/8
|
3/16
|
5.100
|
0.023
|
0.210
|
0.005
|
129.54
|
0.58
|
5.34
|
0.12
|
|
355
|
5 1/4
|
3/16
|
5.225
|
0.023
|
0.210
|
0.005
|
132.72
|
0.58
|
5.34
|
0.12
|
|
356
|
5 3/8
|
3/16
|
5.350
|
0.023
|
0.210
|
0.005
|
135.89
|
0.58
|
5.34
|
0.12
|
|
357
|
5 1/2
|
3/16
|
5.475
|
0.023
|
0.210
|
0.005
|
139.07
|
0.58
|
5.34
|
0.12
|
|
358
|
5 5/8
|
3/16
|
5.600
|
0.023
|
0.210
|
0.005
|
142.24
|
0.58
|
5.34
|
0.12
|
|
359
|
5 3/4
|
3/16
|
5.725
|
0.023
|
0.210
|
0.005
|
145.42
|
0.58
|
5.34
|
0.12
|
|
360
|
5 7/8
|
3/16
|
5.850
|
0.023
|
0.210
|
0.005
|
148.59
|
0.58
|
5.34
|
0.12
|
|
361
|
6
|
3/16
|
5.975
|
0.023
|
0.210
|
0.005
|
151.77
|
0.58
|
5.34
|
0.12
|
|
362
|
6 1/4
|
3/16
|
6.225
|
0.023
|
0.210
|
0.005
|
158.12
|
0.58
|
5.34
|
0.12
|
|
363
|
6 1/2
|
3/16
|
6.475
|
0.023
|
0.210
|
0.005
|
164.47
|
0.58
|
5.34
|
0.12
|
|
364
|
6 3/4
|
3/16
|
6.725
|
0.023
|
0.210
|
0.005
|
170.82
|
0.58
|
5.34
|
0.12
|
|
365
|
7
|
3/16
|
6.975
|
0.023
|
0.210
|
0.005
|
177.17
|
0.58
|
5.34
|
0.12
|
|
366
|
7 1/4
|
3/16
|
7.225
|
0.030
|
0.210
|
0.005
|
183.52
|
0.76
|
5.34
|
0.12
|
|
367
|
7 1/2
|
3/16
|
7.475
|
0.030
|
0.210
|
0.005
|
189.87
|
0.76
|
5.34
|
0.12
|
|
368
|
7 3/4
|
3/16
|
7.725
|
0.030
|
0.210
|
0.005
|
196.22
|
0.76
|
5.34
|
0.12
|
|
369
|
8
|
3/16
|
7.975
|
0.030
|
0.210
|
0.005
|
202.57
|
0.76
|
5.34
|
0.12
|
|
370
|
8 1/4
|
3/16
|
8.225
|
0.030
|
0.210
|
0.005
|
208.92
|
0.76
|
5.34
|
0.12
|
|
371
|
8 1/2
|
3/16
|
8.475
|
0.030
|
0.210
|
0.005
|
215.27
|
0.76
|
5.34
|
0.12
|
|
372
|
8 3/4
|
3/16
|
8.725
|
0.030
|
0.210
|
0.005
|
221.62
|
0.76
|
5.34
|
0.12
|
|
373
|
9
|
3/16
|
8.975
|
0.030
|
0.210
|
0.005
|
227.97
|
0.76
|
5.34
|
0.12
|
|
374
|
9 1/4
|
3/16
|
9.225
|
0.030
|
0.210
|
0.005
|
234.32
|
0.76
|
5.34
|
0.12
|
|
375
|
9 1/2
|
3/16
|
9.475
|
0.030
|
0.210
|
0.005
|
240.67
|
0.76
|
5.34
|
0.12
|
|
376
|
9 3/4
|
3/16
|
9.725
|
0.030
|
0.210
|
0.005
|
247.02
|
0.76
|
5.34
|
0.12
|
|
377
|
10
|
3/16
|
9.975
|
0.030
|
0.210
|
0.005
|
253.37
|
0.76
|
5.34
|
0.12
|
|
378
|
10 1/2
|
3/16
|
10.475
|
0.030
|
0.210
|
0.005
|
266.07
|
0.76
|
5.34
|
0.12
|
|
379
|
11
|
3/16
|
10.975
|
0.030
|
0.210
|
0.005
|
278.77
|
0.76
|
5.34
|
0.12
|
|
380
|
11 1/2
|
3/16
|
11.475
|
0.030
|
0.210
|
0.005
|
291.47
|
0.76
|
5.34
|
0.12
|
|
381
|
12
|
3/16
|
11.975
|
0.030
|
0.210
|
0.005
|
304.17
|
0.76
|
5.34
|
0.12
|
|
382
|
13
|
3/16
|
12.975
|
0.030
|
0.210
|
0.005
|
329.57
|
0.76
|
5.34
|
0.12
|
|
383
|
14
|
3/16
|
13.975
|
0.030
|
0.210
|
0.005
|
354.97
|
0.76
|
5.34
|
0.12
|
|
384
|
15
|
3/16
|
14.975
|
0.030
|
0.210
|
0.005
|
380.37
|
0.76
|
5.34
|
0.12
|
|
385
|
16
|
3/16
|
15.955
|
0.045
|
0.210
|
0.005
|
405.26
|
1.14
|
5.34
|
0.12
|
|
386
|
17
|
3/16
|
16.955
|
0.045
|
0.210
|
0.005
|
430.66
|
1.14
|
5.34
|
0.12
|
|
387
|
18
|
3/16
|
17.955
|
0.045
|
0.210
|
0.005
|
456.06
|
1.14
|
5.34
|
0.12
|
|
388
|
19
|
3/16
|
18.955
|
0.045
|
0.210
|
0.005
|
481.46
|
1.14
|
5.34
|
0.12
|
|
389
|
20
|
3/16
|
19.955
|
0.045
|
0.210
|
0.005
|
506.86
|
1.14
|
5.34
|
0.12
|
|
390
|
21
|
3/16
|
20.955
|
0.045
|
0.210
|
0.005
|
532.26
|
1.14
|
5.34
|
0.12
|
|
391
|
22
|
3/16
|
21.955
|
0.045
|
0.210
|
0.005
|
557.66
|
1.14
|
5.34
|
0.12
|
|
392
|
23
|
3/16
|
22.940
|
0.060
|
0.210
|
0.005
|
582.70
|
1.50
|
5.34
|
0.12
|
|
393
|
24
|
3/16
|
23.940
|
0.060
|
0.210
|
0.005
|
608.10
|
1.50
|
5.34
|
0.12
|
|
394
|
25
|
3/16
|
24.940
|
0.060
|
0.210
|
0.005
|
633.50
|
1.50
|
5.34
|
0.12
|
|
395
|
26
|
3/16
|
25.940
|
0.060
|
0.210
|
0.005
|
658.90
|
1.50
|
5.34
|
0.12
|
|
|
|