O-Ring Size Chart

To locate the O-ring Dash Number, find the inside diameter (I.D.) in the left-hand column, then read across to find the thickness (cross-section). The O-ring Dash Number is at the intersection of the row and column.

*Cross Sections for 001 is .040", 002 is .050", 003 is .060".

Cross sections shown are nominal fractions. Actual Cross-sections are:

ID	Cross Section
	1/16	3/32	1/8	3/16	1/4
1/32	001*
3/64	002*
1/16	003*	102
5/64	004
3/32	005	103
1/8	006	104
5/32	007	105
3/16	008	106	201
7/32	009	107
1/4	010	108	202
5/16	011	109	203
3/8	012	110	204
7/16	013	111	205	309
1/2	014	112	206	310
9/16	015	113	207	311
5/8	016	114	208	312
11/16	017	115	209	313
3/4	018	116	210	314
13/16	019	117	211	315
7/8	020	118	212	316
15/16	021	119	213	317
1	022	120	214	318
1-1/16	023	121	215	319
1-1/8	024	121	216	320
1-3/16	025	124	217	321
1-1/4	026	124	218	322
1-5/16	027	125	219	323
1-3/8	028	126	220	324	400
1-7/16		127	221
1-1/2	029	128	222	325	401
1-9/16		129
1-5/8	030	130	223	326	402
1-11/16		131
1-3/4	031	132	224	327	403
1-13/16		133
1-7/8	032	134	225	328	404
1-15/16		135
2	033	136	226	329	405
2-1/16		137
2-1/8	034	138	227	330	406
2-3/16		139
2-1/4	035	140	228	331	407
2-5/16		141
2-3/8	036	142	229	332	408
2-7/16		143
2-1/2	037	144	230	333	409
2-9/16		145
2-5/8	038	146	231	334	410
2-11/16		147
2-3/4	039	148	232	335	411
2-13/16		149
2-7/8	040	150	233	336	412
3	041	151	234	337	413
3-1/8			235	338	414
3-1/4	042	152	236	339	415
3-3/8			237	340	416
3-1/2	043	153	238	341	417
3-5/8			239	342	418
3-3/4	044	154	240	343	419
3-7/8			241	344	420
4	045	155	242	345	421
4-1/8			243	346	422
4-1/4	046	156	244	347	423
4-3/8			245	348	424
4-1/2	047	157	246	349	425
4-5/8			247	350	426
4-3/4	048	158	248	351	427
4-7/8			249	352	428
5	049	159	250	353	429
5-1/8			251	354	430
5-1/4	050	160	252	355	431
5-3/8			253	356	432
5-1/2		161	254	357	433
5-5/8			255	358	434
5-3/4		162	256	359	435
5-7/8			257	360	436
6		163	258	361	437
6-1/4		164	259	362	438
6-1/2		165	260	363	439
6-3/4		166	261	364	440
7		167	262	365	441
7-1/4		168	263	366	442
7-1/2		169	264	367	443
7-3/4		170	265	368	444
8		171	266	369	445
8-1/4		172	267	370	446
8-1/2		173	268	371	446
8-3/4		174	269	372
9		175	270	373	447
9-1/4		176	271	374
9-1/2		177	272	375	448
9-3/4		178	273	376
10			274	377	449
10-1/2			275	378	450
11			276	379	451
11-1/2			277	380	452
12			278	381	453
12-1/2					454
13			279	382	454
13-1/2					456
14			280	383	457
14-1/2					458
15					454
13			281	384	459
15-1/2					460
16			282	385	461
16-1/2					462
17			283	386	463
17-1/2					464
18			284	387	465
18-1/2					466
19				388	467
19-1/2					468
20				389	469
21				390	470
22				391	471
23				392	472
24				393	473
25				394	474
26				395	475