JIS Silicone O-Rings

Japanese Industrial Standard O-Rings are another popular classification system used around the globe. Published by the Japanese Standard Association, these o-rings are also categorized using the metric system. JIS O-Rings are used in many different fields, but typically are implemented in Japan's semiconductor, automotive and machine tool industries.

This elastomer possesses mechanical properties similar to Viton®, with the exception of its slightly lower compression set resistance. It is more suitable for sensitive applications where lighter compressive forces are applied to energize the seal. This core has a Shore A hardness of 70 but it also offers a broader operating temperature range of -80°F to +500°F. (-62°C to +260°C). For more information, please see: Comparison Properties Chart, PTFE Encapsulated O-rings, Material Shelf Life, and O-ring Groove Design Chart.

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Inside Diameter (in)

Item #	IntegrationID	Type	Material	Cross Section Width	Durometer	Inside Diameter	CSW Tolerance	ID Tolerance	JIS Number	Call for a Quote	O-Ring Industries

P250 S-70	N/A 180361	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.331 in8.40 mm	N/A 70	N/A 249.5 mm9.823 in	N/A 0.006 in0.18 mm	N/A 0.031 in0.80 mm	N/A P-250	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P255 S-70	N/A 180362	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.331 in8.40 mm	N/A 70	N/A 254.5 mm10.020 in	N/A 0.006 in0.18 mm	N/A 0.031 in0.80 mm	N/A P-255	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P26 S-70	N/A 180363	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.138 in3.50 mm	N/A 70	N/A 25.70 mm1.012 in	N/A 0.004 in0.10 mm	N/A 0.006 in0.15 mm	N/A P-26	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P260 S-70	N/A 180364	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.331 in8.40 mm	N/A 70	N/A 259.5 mm10.217 in	N/A 0.006 in0.18 mm	N/A 0.031 in0.80 mm	N/A P-260	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P265 S-70	N/A 180365	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.331 in8.40 mm	N/A 70	N/A 264.5 mm10.413 in	N/A 0.006 in0.18 mm	N/A 0.031 in0.80 mm	N/A P-265	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P270 S-70	N/A 180366	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.331 in8.40 mm	N/A 70	N/A 269.5 mm10.610 in	N/A 0.006 in0.18 mm	N/A 0.031 in0.80 mm	N/A P-270	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P275 S-70	N/A 180367	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.331 in8.40 mm	N/A 70	N/A 274.50 mm10.807 in	N/A 0.006 in0.18 mm	N/A 0.031 in0.80 mm	N/A P-275	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P28 S-70	N/A 180368	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.138 in3.50 mm	N/A 70	N/A 27.70 mm1.091 in	N/A 0.004 in0.10 mm	N/A 0.006 in0.15 mm	N/A P-28	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P280 S-70	N/A 180369	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.331 in8.40 mm	N/A 70	N/A 279.50 mm11.004 in	N/A 0.006 in0.18 mm	N/A 0.031 in0.80 mm	N/A P-280	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P285 S-70	N/A 180370	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.331 in8.40 mm	N/A 70	N/A 284.50 mm11.201 in	N/A 0.006 in0.18 mm	N/A 0.031 in0.80 mm	N/A P-285	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P29 S-70	N/A 180371	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.138 in3.50 mm	N/A 70	N/A 28.70 mm1.130 in	N/A 0.004 in0.10 mm	N/A 0.006 in0.15 mm	N/A P-29	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P29.5 S-70	N/A 180372	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.138 in3.50 mm	N/A 70	N/A 29.20 mm1.150 in	N/A 0.004 in0.10 mm	N/A 0.006 in0.15 mm	N/A P-29.5	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P290 S-70	N/A 180373	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.331 in8.40 mm	N/A 70	N/A 289.50 mm11.398 in	N/A 0.006 in0.18 mm	N/A 0.031 in0.80 mm	N/A P-290	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P295 S-70	N/A 180374	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.331 in8.40 mm	N/A 70	N/A 294.50 mm11.594 in	N/A 0.006 in0.18 mm	N/A 0.031 in0.80 mm	N/A P-295	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P30 S-70	N/A 180375	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.138 in3.50 mm	N/A 70	N/A 29.70 mm1.169 in	N/A 0.004 in0.10 mm	N/A 0.006 in0.15 mm	N/A P-30	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P300 S-70	N/A 180376	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.331 in8.40 mm	N/A 70	N/A 299.50 mm11.791 in	N/A 0.006 in0.18 mm	N/A 0.031 in0.80 mm	N/A P-300	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P31 S-70	N/A 180377	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.138 in3.50 mm	N/A 70	N/A 30.70 mm1.209 in	N/A 0.004 in0.10 mm	N/A 0.006 in0.15 mm	N/A P-31	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P31.5 S-70	N/A 180378	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.138 in3.50 mm	N/A 70	N/A 31.20 mm1.228 in	N/A 0.004 in0.10 mm	N/A 0.006 in0.15 mm	N/A P-31.5	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P315 S-70	N/A 180379	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.331 in8.40 mm	N/A 70	N/A 314.50 mm12.382 in	N/A 0.006 in0.18 mm	N/A 0.039 in1.00 mm	N/A P-315	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P32 S-70	N/A 180380	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.138 in3.50 mm	N/A 70	N/A 31.70 mm1.248 in	N/A 0.004 in0.10 mm	N/A 0.006 in0.15 mm	N/A P-32	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P320 S-70	N/A 180381	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.331 in8.40 mm	N/A 70	N/A 319.50 mm12.579 in	N/A 0.006 in0.18 mm	N/A 0.039 in1.00 mm	N/A P-320	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P335 S-70	N/A 180382	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.331 in8.40 mm	N/A 70	N/A 334.50 mm13.169 in	N/A 0.006 in0.18 mm	N/A 0.039 in1.00 mm	N/A P-335	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P34 S-70	N/A 180383	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.138 in3.50 mm	N/A 70	N/A 33.70 mm1.327 in	N/A 0.004 in0.10 mm	N/A 0.006 in0.15 mm	N/A P-34	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P340 S-70	N/A 180384	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.331 in8.40 mm	N/A 70	N/A 339.50 mm13.366 in	N/A 0.006 in0.18 mm	N/A 0.039 in1.00 mm	N/A P-340	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P35 S-70	N/A 180385	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.138 in3.50 mm	N/A 70	N/A 34.70 mm1.366 in	N/A 0.004 in0.10 mm	N/A 0.006 in0.15 mm	N/A P-35	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.

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10.70
10.80
101.60
104.40
104.50
104.60
1044.00
109.40
109.50
109.60
11.00
11.50
11.80
111.50
111.60
114.40
114.50
114.60
119.00
119.40
119.50
119.60
12.00
12.30
124.40
124.50
124.60
129.40
129.50
129.60
13.50
13.80
131.50
131.6
134.40
134.50
134.60
139.40
139.50
139.60
14.5
14.80
144.40
144.50
144.60
148.50
149.30
149.50
149.6
15.50
15.80
154.30
154.50
159.30
159.50
164.30
164.50
169.30
169.50
17.50
17.80
173.00
174.30
174.50
179.30
179.50
184.30
184.50
189.30
189.50
19.50
19.80
194.30
194.50
199.3
199.5
2.50
20.80
204.5
208.5
209.3
209.5
21.50
21.70
21.80
21.90
214.5
219.3
219.5
22.10
222.5
224.5
229.3
229.5
23.5
23.70
234.5
239.3
239.5
24.40
24.50
24.70
244.5
249.3
249.5
25.20
25.50
25.70
254.3
254.5
259.3
259.5
264.5
269.3
269.5
27.50
27.70
272
274.50
279.30
279.50
28.50
28.70
284.50
289.30
289.50
29.20
29.40
29.50
29.70
294.50
299.30
299.50
3.50
3.80
30.70
31.00
31.20
31.50
31.70
314.50
319.50
321.50
33.50
33.70
334.50
339.50
34.40
34.50
34.70
35.00
35.20
35.50
35.70
354.50
359.50
37.50
37.70
374.50
376.00
38.50
38.70
384.50
39.40
39.50
39.70
399.5
4.50
4.80
40.70
41.50
41.70
425.5
43.50
43.70
44.40
44.50
44.70
45.5
45.70
47.50
47.60
47.70
475.00
48.70
49.40
49.50
49.60
49.70
5.50
5.80
51.60
52.50
52.6
524.5
54.40
54.50
54.60
55.50
55.60
57.60
579.00
59.4
59.50
59.6
6.50
6.80
61.60
62.50
62.60
633.5
64.40
64.5
64.60
66.50
66.60
683.00
69.00
69.4
69.5
69.6
7.50
7.80
70.50
70.60
732.50
74.40
74.50
74.60
782.00
79.40
79.50
79.60
8.50
8.80
836.50
84.00
84.40
84.50
84.60
89.40
89.50
89.60
9.50
9.80
94.40
94.50
94.60
940.50
99.00
99.40
99.50
99.60

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0.098
0.138
0.150
0.177
0.189
0.217
0.228
0.256
0.268
0.295
0.307
0.335
0.346
0.374
0.386
0.421
0.425
0.433
0.453
0.465
0.472
0.484
0.531
0.543
0.571
0.583
0.610
0.622
0.689
0.701
0.768
0.780
0.819
0.846
0.854
0.858
0.862
0.870
0.925
0.933
0.961
0.965
0.972
0.992
1.004
1.012
1.083
1.091
1.122
1.130
1.150
1.157
1.161
1.169
1.209
1.220
1.228
1.240
1.248
1.319
1.327
1.354
1.358
1.366
1.378
1.386
1.398
1.406
1.476
1.484
1.516
1.524
1.551
1.555
1.563
1.602
1.634
1.642
1.713
1.720
1.748
1.752
1.760
1.791
1.799
1.870
1.874
1.878
1.917
1.945
1.949
1.953
1.957
10.012
10.020
10.209
10.217
10.413
10.602
10.610
10.709
10.807
10.996
11.004
11.201
11.390
11.398
11.594
11.783
11.791
12.382
12.579
12.657
13.169
13.366
13.957
14.154
14.744
14.803
15.138
15.728
16.752
18.701
2.031
2.067
2.071
2.142
2.146
2.150
2.185
2.189
2.268
2.339
2.343
2.346
2.425
2.461
2.465
2.535
2.539
2.543
2.618
2.622
2.717
2.732
2.736
2.740
2.776
2.780
2.929
2.933
2.937
20.650
22.795
24.941
26.890
28.839
3.126
3.130
3.134
3.307
3.323
3.327
3.331
3.520
3.524
3.528
3.717
3.720
3.724
3.898
3.913
3.917
3.921
30.787
32.933
37.028
4.000
4.110
4.114
4.118
4.307
4.311
4.315
4.390
4.394
4.504
4.508
4.512
4.685
4.701
4.705
4.709
4.898
4.902
4.906
41.102
5.094
5.098
5.102
5.177
5.181
5.291
5.295
5.299
5.488
5.492
5.496
5.685
5.689
5.693
5.846
5.878
5.886
5.890
6.075
6.083
6.272
6.280
6.469
6.476
6.665
6.673
6.811
6.862
6.870
7.059
7.067
7.256
7.264
7.453
7.461
7.650
7.657
7.846
7.854
8.051
8.209
8.240
8.248
8.445
8.634
8.642
8.760
8.839
9.028
9.035
9.232
9.421
9.429
9.626
9.815
9.823