JIS B2401 O-ring size chart

Name: National Rubber Corporation
Address: 367 Morganza Road, Canonsburg, PA, 15317, US
Telephone: +1-412-831-6100

Cross-section series

JIS B2401 series and cross-sections
JIS No.	Series	CS (mm)	CS (in)
P003 to P010	P	1.90	0.075
P010A to P012	P	2.40	0.094
P014 to P022	P	2.40	0.094
P022A to P050	P	3.50	0.138
P048A to P150	P	5.70	0.224
P150A to P400	P	8.40	0.331
G025 to G105	G	3.10	0.122
G115 to G145	G	3.10	0.122

P series

JIS B2401 P series O-ring sizes
JIS No.	ID x CS (mm)	OD (mm)	ID x CS (in)	OD (in)
P003	2.80 x 1.90	6.60	0.110 x 0.075	0.260
P004	3.80 x 1.90	7.60	0.150 x 0.075	0.299
P005	4.80 x 1.90	8.60	0.189 x 0.075	0.339
P006	5.80 x 1.90	9.60	0.228 x 0.075	0.378
P007	6.80 x 1.90	10.60	0.268 x 0.075	0.417
P008	7.80 x 1.90	11.60	0.307 x 0.075	0.457
P009	8.80 x 1.90	12.60	0.346 x 0.075	0.496
P010	9.80 x 1.90	13.60	0.386 x 0.075	0.535
P010A	9.80 x 2.40	14.60	0.386 x 0.094	0.575
P011	10.80 x 2.40	15.60	0.425 x 0.094	0.614
P011.2	11.00 x 2.40	15.80	0.433 x 0.094	0.622
P012	11.80 x 2.40	16.60	0.465 x 0.094	0.654
P014	13.80 x 2.40	18.60	0.543 x 0.094	0.732
P015	14.80 x 2.40	19.60	0.583 x 0.094	0.772
P016	15.80 x 2.40	20.60	0.622 x 0.094	0.811
P018	17.80 x 2.40	22.60	0.701 x 0.094	0.890
P020	19.80 x 2.40	24.60	0.780 x 0.094	0.969
P021	20.80 x 2.40	25.60	0.819 x 0.094	1.008
P022	21.80 x 2.40	26.60	0.858 x 0.094	1.047
P022A	21.70 x 3.50	28.70	0.854 x 0.138	1.130
P022.4	22.10 x 3.50	29.10	0.870 x 0.138	1.146
P024	23.70 x 3.50	30.70	0.933 x 0.138	1.209
P025	24.70 x 3.50	31.70	0.972 x 0.138	1.248
P025.5	25.20 x 3.50	32.20	0.992 x 0.138	1.268
P026	25.70 x 3.50	32.70	1.012 x 0.138	1.287
P028	27.70 x 3.50	34.70	1.091 x 0.138	1.366
P029	28.70 x 3.50	35.70	1.130 x 0.138	1.406
P029.5	29.20 x 3.50	36.20	1.150 x 0.138	1.425
P030	29.70 x 3.50	36.70	1.169 x 0.138	1.445
P031	30.70 x 3.50	37.70	1.209 x 0.138	1.484
P031.5	31.20 x 3.50	38.20	1.228 x 0.138	1.504
P032	31.70 x 3.50	38.70	1.248 x 0.138	1.524
P034	33.70 x 3.50	40.70	1.327 x 0.138	1.602
P035	34.70 x 3.50	41.70	1.366 x 0.138	1.642
P035.5	35.20 x 3.50	42.20	1.386 x 0.138	1.661
P036	35.70 x 3.50	42.70	1.406 x 0.138	1.681
P038	37.70 x 3.50	44.70	1.484 x 0.138	1.760
P039	38.70 x 3.50	45.70	1.524 x 0.138	1.799
P040	39.70 x 3.50	46.70	1.563 x 0.138	1.839
P041	40.70 x 3.50	47.70	1.602 x 0.138	1.878
P042	41.70 x 3.50	48.70	1.642 x 0.138	1.917
P044	43.70 x 3.50	50.70	1.720 x 0.138	1.996
P045	44.70 x 3.50	51.70	1.760 x 0.138	2.035
P046	45.70 x 3.50	52.70	1.799 x 0.138	2.075
P048	47.70 x 3.50	54.70	1.878 x 0.138	2.154
P049	48.70 x 3.50	55.70	1.917 x 0.138	2.193
P050	49.70 x 3.50	56.70	1.957 x 0.138	2.232
P048A	47.60 x 5.70	59.00	1.874 x 0.224	2.323
P050A	49.60 x 5.70	61.00	1.953 x 0.224	2.402
P052	51.60 x 5.70	63.00	2.031 x 0.224	2.480
P053	52.60 x 5.70	64.00	2.071 x 0.224	2.520
P055	54.60 x 5.70	66.00	2.150 x 0.224	2.598
P056	55.60 x 5.70	67.00	2.189 x 0.224	2.638
P058	57.60 x 5.70	69.00	2.268 x 0.224	2.717
P060	59.60 x 5.70	71.00	2.346 x 0.224	2.795
P062	61.60 x 5.70	73.00	2.425 x 0.224	2.874
P063	62.60 x 5.70	74.00	2.465 x 0.224	2.913
P065	64.60 x 5.70	76.00	2.543 x 0.224	2.992
P067	66.60 x 5.70	78.00	2.622 x 0.224	3.071
P070	69.60 x 5.70	81.00	2.740 x 0.224	3.189
P071	70.60 x 5.70	82.00	2.780 x 0.224	3.228
P075	74.60 x 5.70	86.00	2.937 x 0.224	3.386
P080	79.60 x 5.70	91.00	3.134 x 0.224	3.583
P085	84.60 x 5.70	96.00	3.331 x 0.224	3.780
P090	89.60 x 5.70	101.00	3.528 x 0.224	3.976
P095	94.60 x 5.70	106.00	3.724 x 0.224	4.173
P100	99.60 x 5.70	111.00	3.921 x 0.224	4.370
P102	101.60 x 5.70	113.00	4.000 x 0.224	4.449
P105	104.60 x 5.70	116.00	4.118 x 0.224	4.567
P110	109.60 x 5.70	121.00	4.315 x 0.224	4.764
P112	111.60 x 5.70	123.00	4.394 x 0.224	4.843
P115	114.60 x 5.70	126.00	4.512 x 0.224	4.961
P120	119.60 x 5.70	131.00	4.709 x 0.224	5.157
P125	124.60 x 5.70	136.00	4.906 x 0.224	5.354
P130	129.60 x 5.70	141.00	5.102 x 0.224	5.551
P132	131.60 x 5.70	143.00	5.181 x 0.224	5.630
P135	134.60 x 5.70	146.00	5.299 x 0.224	5.748
P140	139.60 x 5.70	151.00	5.496 x 0.224	5.945
P145	144.60 x 5.70	156.00	5.693 x 0.224	6.142
P150	149.60 x 5.70	161.00	5.890 x 0.224	6.339
P150A	149.50 x 8.40	166.30	5.886 x 0.331	6.547
P155	154.50 x 8.40	171.30	6.083 x 0.331	6.744
P160	159.50 x 8.40	176.30	6.280 x 0.331	6.941
P165	164.50 x 8.40	181.30	6.476 x 0.331	7.138
P170	169.50 x 8.40	186.30	6.673 x 0.331	7.335
P175	174.50 x 8.40	191.30	6.870 x 0.331	7.531
P180	179.50 x 8.40	196.30	7.067 x 0.331	7.728
P185	184.50 x 8.40	201.30	7.264 x 0.331	7.925
P190	189.50 x 8.40	206.30	7.461 x 0.331	8.122
P195	194.50 x 8.40	211.30	7.657 x 0.331	8.319
P200	199.50 x 8.40	216.30	7.854 x 0.331	8.516
P205	204.50 x 8.40	221.30	8.051 x 0.331	8.713
P209	208.50 x 8.40	225.30	8.209 x 0.331	8.870
P210	209.50 x 8.40	226.30	8.248 x 0.331	8.909
P215	214.50 x 8.40	231.30	8.445 x 0.331	9.106
P220	219.50 x 8.40	236.30	8.642 x 0.331	9.303
P225	224.50 x 8.40	241.30	8.839 x 0.331	9.500
P230	229.50 x 8.40	246.30	9.035 x 0.331	9.697
P235	234.50 x 8.40	251.30	9.232 x 0.331	9.894
P240	239.50 x 8.40	256.30	9.429 x 0.331	10.091
P245	244.50 x 8.40	261.30	9.626 x 0.331	10.287
P250	249.50 x 8.40	266.30	9.823 x 0.331	10.484
P255	254.50 x 8.40	271.30	10.020 x 0.331	10.681
P260	259.50 x 8.40	276.30	10.217 x 0.331	10.878
P265	264.50 x 8.40	281.30	10.413 x 0.331	11.075
P270	269.50 x 8.40	286.30	10.610 x 0.331	11.272
P275	274.50 x 8.40	291.30	10.807 x 0.331	11.469
P280	279.50 x 8.40	296.30	11.004 x 0.331	11.665
P285	284.50 x 8.40	301.30	11.201 x 0.331	11.862
P290	289.50 x 8.40	306.30	11.398 x 0.331	12.059
P295	294.50 x 8.40	311.30	11.594 x 0.331	12.256
P300	299.50 x 8.40	316.30	11.791 x 0.331	12.453
P315	314.50 x 8.40	331.30	12.382 x 0.331	13.043
P320	319.50 x 8.40	336.30	12.579 x 0.331	13.240
P335	334.50 x 8.40	351.30	13.169 x 0.331	13.831
P340	339.50 x 8.40	356.30	13.366 x 0.331	14.028
P355	354.50 x 8.40	371.30	13.957 x 0.331	14.618
P360	359.50 x 8.40	376.30	14.154 x 0.331	14.815
P375	374.50 x 8.40	391.30	14.744 x 0.331	15.406
P385	384.50 x 8.40	401.30	15.138 x 0.331	15.799
P400	399.50 x 8.40	416.30	15.728 x 0.331	16.390

G series

JIS B2401 G series O-ring sizes
JIS No.	ID x CS (mm)	OD (mm)	ID x CS (in)	OD (in)
G025	24.40 x 3.10	30.60	0.961 x 0.122	1.205
G030	29.40 x 3.10	35.60	1.157 x 0.122	1.402
G035	34.40 x 3.10	40.60	1.354 x 0.122	1.598
G040	39.40 x 3.10	45.60	1.551 x 0.122	1.795
G045	44.40 x 3.10	50.60	1.748 x 0.122	1.992
G050	49.40 x 3.10	55.60	1.945 x 0.122	2.189
G055	54.40 x 3.10	60.60	2.142 x 0.122	2.386
G060	59.40 x 3.10	65.60	2.339 x 0.122	2.583
G065	64.40 x 3.10	70.60	2.535 x 0.122	2.780
G070	69.40 x 3.10	75.60	2.732 x 0.122	2.976
G075	74.40 x 3.10	80.60	2.929 x 0.122	3.173
G080	79.40 x 3.10	85.60	3.126 x 0.122	3.370
G085	84.40 x 3.10	90.60	3.323 x 0.122	3.567
G090	89.40 x 3.10	95.60	3.520 x 0.122	3.764
G095	94.40 x 3.10	100.60	3.717 x 0.122	3.961
G100	99.40 x 3.10	105.60	3.913 x 0.122	4.157
G105	104.40 x 3.10	110.60	4.110 x 0.122	4.354
G115	114.40 x 3.10	120.60	4.504 x 0.122	4.748
G120	119.40 x 3.10	125.60	4.701 x 0.122	4.945
G125	124.40 x 3.10	130.60	4.898 x 0.122	5.142
G130	129.40 x 3.10	135.60	5.094 x 0.122	5.339
G135	134.40 x 3.10	140.60	5.291 x 0.122	5.535
G140	139.40 x 3.10	145.60	5.488 x 0.122	5.732
G145	144.40 x 3.10	150.60	5.685 x 0.122	5.929

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