www.par-group.co.uk Preston (Head office): +44 (0) 1257 248369: Manchester: +44 (0) 1706 363790
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O-Rings are the most widely recognised seal and are commonly found in many different applications. Our most common types are rubber o-rings which are available in various compounds to suit your application. PAR supply the complete range of standard sizes. We also manufacture non standard sizes to order and can vulcanise rubber cords for larger sizes. When enquiring, please refer to the table below for all BS o-ring dimensions. Also, please state the rubber compound that you require.
BS Number
O-Ring Size (ID x Cross Section (mm))
Nominal Size (Inches)
BS001
0.74 x 1.02
1/32
3/32
BS002
1.07 x 1.27
3/64
9/64
BS003
1.42 x 1.52
1/16
3/16
BS004
1.78 x 1.78
5/64
13/64
BS005
2.57 x 1.78
7/32
BS006
2.90 x 1.78
1/8
1/4
BS007
3.68 x 1.78
5/32
9/32
BS008
4.47 x 1.78
5/16
BS009
5.28 x 1.78
11/32
BS010
6.07 x 1.78
3/8
BS011
7.65 x 1.78
7/16
BS012
9.25 x 1.78
1/2
BS013
10.82 x 1.78
9/16
BS014
12.42 x 1.78
5/8
BS015
14 x 1.78
11/16
BS016
15.6 x 1.78
3/4
BS017
17.17 x 1.78
13/16
BS018
18.77 x 1.78
7/8
BS019
20.35 x 1.78
15/16
BS020
21.95 x 1.78
1
BS021
23.52 x 1.78
1 1/16
BS022
25.12 x 1.78
1 1/8
BS023
26.7 x 1.78
1 3/16
BS024
28.3 x 1.78
1 1/4
BS025
29.87 x 1.78
1 13/16
1 5/16
BS026
31.47 x 1.78
1 3/8
BS027
33.05 x 1.78
1 7/16
BS028
34.65 x 1.78
1 1/2
BS029
37.82 x 1.78
1 5/8
BS030
41.0 x 1.78
1 3/4
BS031
44.17 x 1.78
1 7/8
BS032
47.35 x 1.78
2
BS033
50.52 x 1.78
2 1/8
BS034
53.7 x 1.78
2 1/4
BS035
56.87 x 1.78
2 3/8
BS036
60.05 x 1.78
2 1/2
BS037
63.22 x 1.781
2 5/8
BS038
66.4 x 1.78
2 3/4
BS039
69.57 x 1.78
2 7/8
BS040
72.75 x 1.78
3
BS041
75.92 x 1.78
3 1/8
BS042
82.27 x 1.78
3 1/4
3 3/8
BS043
88.62 x 1.78
3 1/2
3 5/8
BS044
94.97 x 1.78
3 3/4
3 7/8
BS045
101.32 x 1.78
4
4 1/8
BS046
107.67 x 1.78
4 1/4
4 3/8
BS047
114.02 x 1.78
4 1/2
4 5/8
BS048
120.37 x 1.78
4 3/4
4 7/8
BS049
126.72 x 1.78
5
5 1/8
BS050
133.07 x 1.78
5 1/4
5 3/8
BS102
1.25 x 2.62
BS103
2.06 x 2.62
BS104
2.85 x 2.62
BS105
3.63 x 2.62
BS106
4.42 x 2.62
BS107
5.23 x 2.62
13/32
BS108
6.02 x 2.62
BS109
7.60 x 2.62
BS110
9.20 x 2.62
BS111
10.77 x 2.62
BS112
12.37 x 2.62
BS113
13.95 x 2.62
BS114
15.55 x 2.62
BS115
17.12 x 2.62
BS116
18.72 x 2.62
BS117
20.30 x 2.62
BS118
21.90 x 2.62
BS119
23.47 x 2.62
BS120
25.07 x 2.62
BS121
26.65 x 2.62
BS122
28.25 x 2.62
BS123
29.82 x 2.62
BS124
31.42 x 2.62
BS125
33.0 x 2.62
BS126
34.6 x 2.62
1 9/16
BS127
36.17 x 2.62
BS128
37.77 x 2.62
1 11/16
BS129
39.35 x 2.62
BS130
40.95 x 2.62
BS131
42.52 x 2.62
BS132
44.12 x 2.62
1 15/16
BS133
45.7 x 2.62
BS134
47.30 x 2.62
2 1/16
BS135
48.90 x 2.62
BS136
50.47 x 2.62
2 3/16
BS137
52.07 x 2.62
BS138
53.64 x 2.62
2 5/16
BS139
55.25 x 2.62
BS140
56.82 x 2.62
2 7/16
BS141
58.42 x 2.62
BS142
59.99 x 2.62
2 9/16
BS143
61.60 x 2.62
BS144
63.17 x 2.62
2 11/16
BS145
64.77 x 2.62
BS146
66.34 x 2.62
2 13/16
BS147
67.95 x 2.62
BS148
69.52 x 2.62
2 15/16
BS149
71.12 x 2.62
BS150
72.70 x 2.62
3 1/16
BS151
75.87 x 2.62
3 3/16
BS152
82.22 x 2.62
3 7/16
BS153
88.57 x 2.62
3 11/16
BS154
94.92 x 2.62
3 15/16
BS155
101.27 x 2.62
4 3/16
BS156
107.62 x 2.62
4 7/16
BS157
113.97 x 2.62
4 11/16
BS158
120.32 x 2.62
4 15/16
BS159
126.67 x 2.62
5 3/16
BS160
133.02 x 2.62
5 7/16
BS161
139.37 x 2.62
5 1/2
5 11/16
BS162
145.72 x 2.62
5 3/4
5 15/16
BS163
152.07 x 2.62
6
6 3/16
BS164
158.42 x 2.62
6 1/4
6 7/16
BS165
164.77 x 2.62
6 1/2
6 11/16
BS166
171.12 x 2.62
6 3/4
6 15/16
BS167
177.47 x 2.62
7
7 3/16
BS168
183.82 x 2.62
7 1/4
7 7/16
BS169
190.17 x 2.62
7 1/2
7 11/16
BS170
196.52 x 2.62
7 3/4
7 15/16
BS171
202.87 x 2.62
8
8 3/16
BS172
209.22 x 2.62
8 1/4
8 7/16
BS173
215.57 x 2.62
8 1/2
8 11/16
BS174
221.92 x 2.62
8 3/4
8 15/16
BS175
228.27 x 2.62
9
9 3/16
BS176
234.62 x 2.62
9 1/4
9 7/16
BS177
240.97 x 2.62
9 1/2
9 11/16
BS178
247.32 x 2.62
9 3/4
9 15/16
BS201
4.34 x 3.53
BS202
5.94 x 3.53
BS203
7.52 x 3.53
BS204
9.12 x 3.53
BS205
10.69 x 3.53
BS206
12.29 x 3.53
BS207
13.87 x 3.53
BS208
15.47 x 3.53
BS209
17.04 x 3.53
BS210
18.64 x 3.53
BS211
20.22 x 3.53
BS212
21.82 x 3.53
BS213
23.39 x 3.53
BS214
24.99 x 3.53
BS215
26.57 x 3.53
BS216
28.17 x 3.53
BS217
29.74 x 3.53
BS218
31.34 x 3.53
BS219
32.92 x 3.53
BS220
34.52 x 3.53
BS221
36.09 x 3.53
BS222
37.69 x 3.53
BS223
40.87 x 3.53
BS224
44.09 x 3.53
BS225
47.22 x 3.53
BS226
50.39 x 3.53
BS227
53.57 x 3.53
BS228
56.75 x 3.53
BS229
59.92 x 3.53
BS230
63.09 x 3.53
BS231
66.27 x 3.53
BS232
69.44 x 3.53
BS233
72.62 x 3.53
BS234
75.80 x 3.53
BS235
78.97 x 3.53
BS236
82.14 x 3.53
BS237
85.32 x 3.53
BS238
88.49 x 3.53
BS239
91.67 x 3.53
BS240
94.84 x 3.53
BS241
98.02 x 3.53
BS242
101.20 x 3.53
BS243
104.37 x 3.53
BS244
107.54 x 3.53
BS245
110.72 x 3.53
BS246
113.89 x 3.53
BS247
117.07 x 3.53
BS248
120.24 x 3.53
BS249
123.42 x 3.53
BS250
126.60 x 3.53
BS251
129.77 x 3.53
BS252
132.95 x 3.53
BS253
136.12 x 3.53
5 5/8
BS254
139.30 x 3.53
BS255
142.47 x 3.53
5 7/8
BS256
145.64 x 3.53
BS257
148.82 x 3.53
6 1/8
BS258
152.0 x 3.53
BS259
158.34 x 3.53
BS260
164.70 x 3.53
BS261
171.04 x 3.53
BS262
177.40 x 3.53
BS263
183.74 x 3.53
BS264
190.10 x 3.53
BS265
196.44 x 3.53
BS266
202.80 x 3.53
BS267
209.14 x 3.53
BS268
215.50 x 3.53
BS269
221.84 x 3.53
BS270
228.20 x 3.53
BS271
234.55 x 3.53
BS272
240.90 x 3.53
BS273
247.25 x 3.53
10
BS274
253.60 x 3.53
10 1/4
BS275
266.29 x 3.53
10 1/2
10 3/4
BS276
278.99 x 3.53
11
11 1/4
BS277
291.69 x 3.53
11 1/2
11 3/4
BS278
304.39 x 3.53
12
12 1/4
BS279
329.79 x 3.53
13
13 1/4
BS280
355.19 x 3.53
14
14 1/4
BS281
380.59 x 3.53
15
15 1/4
BS282
405.26 x 3.53
16
16 1/4
BS283
430.66 x 3.53
17
17 1/4
BS284
456.06 x 3.53
18
18 1/4
BS309
10.47 x 5.33
BS310
12.07 x 5.33
BS311
13.64 x 5.33
BS312
15.24 x 5.33
BS313
16.82 x 5.33
BS314
18.42 x 5.33
BS315
19.99 x 5.33
BS316
21.59 x 5.33
BS317
23.17 x 5.33
BS318
24.77 x 5.33
BS319
26.34 x 5.33
BS320
27.94 x 5.33
BS321
29.52 x 5.33
BS322
31.12 x 5.33
BS323
32.69 x 5.33
BS324
34.29 x 5.33
BS325
37.47 x 5.33
BS326
40.64 x 5.33
BS327
43.82 x 5.33
BS328
46.99 x 5.33
BS329
50.17 x 5.33
BS330
53.34 x 5.33
BS331
56.52 x 5.33
BS332
59.69 x 5.33
BS333
62.87 x 5.33
BS334
66.64 x 5.33
BS335
69.22 x 5.33
BS336
72.39 x 5.33
BS337
75.57 x 5.33
BS338
78.74 x 5.33
BS339
81.92 x 5.33
BS340
85.09 x 5.33
BS341
88.27 x 5.33
BS342
91.44 x 5.33
BS343
94.62 x 5.33
BS344
97.79 x 5.33
BS345
100.97 x 5.33
BS346
104.14 x 5.33
BS347
107.32 x 5.33
BS348
110.49 x 5.33
BS349
113.67 x 5.33
BS350
116.84 x 5.33
BS351
120.02 x 5.33
BS352
123.19 x 5.33
BS353
126.37 x 5.33
BS354
129.54 x 5.33
BS355
132.72 x 5.33
BS356
135.89 x 5.33
BS357
139.07 x 5.33
BS358
142.24 x 5.33
BS359
145.42 x 5.33
BS360
148.59 x 5.33
BS361
151.77 x 5.33
6 3/8
BS362
158.12 x 5.33
6 5/8
BS363
164.47 x 5.33
6 7/8
BS364
170.82 x 5.33
7 1/8
BS365
177.17 x 5.33
7 3/8
BS366
183.52 x 5.33
7 5/8
BS367
189.87 x 5.33
7 7/8
BS368
196.22 x 5.33
8 1/8
BS369
202.57 x 5.33
8 3/8
BS370
208.92 x 5.33
8 5/8
BS371
215.27 x 5.33
8 7/8
BS372
221.62 x 5.33
9 1/8
BS373
227.97 x 5.33
9 3/8
BS374
234.32 x 5.33
9 5/8
BS375
240.67 x 5.33
9 7/8
BS376
247.02 x 5.33
10 1/8
BS377
253.37 x 5.33
10 3/8
BS378
266.07 x 5.33
10 7/8
BS379
278.77 x 5.33
11 3/8
BS380
291.47 x 5.33
11 7/8
BS381
304.17 x 5.33
12 3/8
BS382
329.57 x 5.33
13 3/8
BS383
354.97 x 5.33
14 3/8
BS384
380.37 x 5.33
15 3/8
BS385
405.26 x 5.33
16 3/8
BS386
430.66 x 5.33
17 3/8
BS387
456.06 x 5.33
18 3/8
BS388
481.38 x 5.33
19
19 3/8
BS389
506.78 x 5.33
20
20 3/8
BS390
532.18 x 5.33
21
21 3/8
BS391
557.58 x 5.33
22
22 3/8
BS392
582.68 x 5.33
23
23 3/8
BS393
608.08 x 5.33
24
24 3/8
BS394
633.48 x 5.33
25
25 3/8
BS395
658.88 x 5.33
26
26 3/8
BS425
113.67 x 7
BS426
116.84 x 7
BS427
120.02 x 7
BS428
123.19 x 7
BS429
126.37 x 7
BS430
129.54 x 7
BS431
132.72 x 7
BS432
135.89 x 7
BS433
139.07 x 7
BS434
142.24 x 7
BS435
145.42 x 7
BS436
148.59 x 7
BS437
151.77 x 7
BS438
158.12 x 7
BS439
164.47 x 7
BS440
170.82 x 7
BS441
177.17 x 7
BS442
183.52 x 7
BS443
189.87 x 7
BS444
196.22 x 7
BS445
202.57 x 7
BS446
215.27 x 7
BS447
227.97 x 7
BS448
240.67 x 7
BS449
253.37 x 7
BS450
266.07 x 7
BS451
278..77 x 7
BS452
291.47 x 7
BS453
304.17 x 7
12 1/2
BS454
316.87 x 7
BS455
329.57 x 7
13 1/2
BS456
342.27 x 7
BS457
354.97 x 7
14 1/2
BS458
367.67 x 7
BS459
380.37 x 7
15 1/2
BS460
393.07 x 7
BS461
405.26 x 7
16 1/2
BS462
417.96 x 7
BS463
430.66 x 7
17 1/2
BS464
443.36 x 7
BS465
456.06 x 7
18 1/2
BS466
468.76 x 7
BS467
481.46 x 7
19 1/2
BS468
494.16 x 7
BS469
506.86 x 7
20 1/2
BS470
532.26 x 7
21 1/2
BS471
557.66 x 7
22 1/2
BS472
582.68 x 7
23 1/2
BS473
608.08 x 7
24 1/2
BS474
633.48 x 7
25 1/2
BS475
658.88 x 7
26 1/2
BS901
4.7 x 1.42
BS902
6.02 x 1.63
BS903
7.65 x 1.63
BS904
8.92 x 1.83
BS905
10.72 x 1.83
BS906
11.90 x 1.98
BS907
13.46 x 2.08
BS908
16.36 x 2.21
BS909
17.93 x 2.46
BS910
19.18 x 2.46
BS911
21.92 x 2.95
BS912
23.47 x 2.95
BS913
25.04 x 2.95
BS914
26.61 x 2.95
BS916
29.74 x 2.95
BS918
34.42 x 2.95
BS920
37.47 x 3
BS924
43.69 x 3.00
BS928
53.09 x 3.00
BS932
59.36 x 3.00