What size is an AS568-214 o-ring?

AS568-214 is 0.9840 in (24.990 mm) inside diameter with a 0.1390 in (3.530 mm) cross-section, giving a 1.2620 in (32.050 mm) outside diameter.

How many AS568 o-ring sizes are there?

349 standard dash numbers across 6 cross-section series, from AS568-001 at 0.0290 in inside diameter to AS568-395 at 25.9400 in. Every one is in the table on this page.

How do I measure an o-ring to find its dash number?

Measure the inside diameter and the cross-section free-state, then match both — the cross-section narrows the search to one series and the inside diameter finds the size within it. Sorting the chart on this page by cross-section and then reading down the inside-diameter column does the same job.

What gland depth does an AS568 o-ring need?

Gland depth follows the cross-section, so every size in a series shares one groove depth. This chart carries 6 verified static gland rules from MIL-G-5514G, listed in the gland table on this page; dynamic service has no verified band in this dataset and none is shown.

Chart · AS568 o-rings

AS568 O-Ring Size Chart — Every Dash Number, Inch and Metric

https://shopmath.org/charts/o-ring-sizes · data verified August 1, 2026

An AS568-214 o-ring is 0.9840 in (24.990 mm) inside diameter × 0.1390 in (3.530 mm) cross-section. All 349 AS568 dash numbers in one table, from AS568-001 at 0.0290 in to AS568-395 at 25.9400 in inside diameter, in both units, with static gland depths by series. Dimensions are free-state.

Sizes: 349
Series: 6
Gland rules: 6
Verified: August 1, 2026

Most looked-up row · AS568-214 · inside Ø × cross-section

0.9840 × 0.1390 in

Inside Ø: 24.990mm
Cross-section: 3.530mm
Outside Ø: 32.050mm

Free-state, before installation. Full AS568-214 o-ring page →

AS568 O-Ring Size Chart — Every Dash Number

One row per dash number, in inches and millimetres, with every row linking to that size's own page. Filter to a cross-section series or sort by inside diameter; the full table is present either way.

Series

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349 sizes shown

AS568 o-ring sizes — inside diameter, cross-section and outside diameter in inch and millimetre
Property	Property	Inside Ø		Cross-section		Outside Ø
Dash	Series	in	mm	in	mm	in	mm
001	001-003	0.0290	0.740	0.0400	1.020	0.1090	2.780
002	001-003	0.0420	1.070	0.0500	1.270	0.1420	3.610
003	001-003	0.0560	1.420	0.0600	1.520	0.1760	4.460
004	004-050	0.0700	1.780	0.0700	1.780	0.2100	5.340
005	004-050	0.1010	2.570	0.0700	1.780	0.2410	6.130
006	004-050	0.1140	2.900	0.0700	1.780	0.2540	6.460
007	004-050	0.1450	3.680	0.0700	1.780	0.2850	7.240
008	004-050	0.1760	4.470	0.0700	1.780	0.3160	8.030
009	004-050	0.2080	5.280	0.0700	1.780	0.3480	8.840
010	004-050	0.2390	6.070	0.0700	1.780	0.3790	9.630
011	004-050	0.3010	7.650	0.0700	1.780	0.4410	11.210
012	004-050	0.3640	9.250	0.0700	1.780	0.5040	12.810
013	004-050	0.4260	10.820	0.0700	1.780	0.5660	14.380
014	004-050	0.4890	12.420	0.0700	1.780	0.6290	15.980
015	004-050	0.5510	14.000	0.0700	1.780	0.6910	17.560
016	004-050	0.6140	15.600	0.0700	1.780	0.7540	19.160
017	004-050	0.6760	17.170	0.0700	1.780	0.8160	20.730
018	004-050	0.7390	18.770	0.0700	1.780	0.8790	22.330
019	004-050	0.8010	20.350	0.0700	1.780	0.9410	23.910
020	004-050	0.8640	21.950	0.0700	1.780	1.0040	25.510
021	004-050	0.9260	23.520	0.0700	1.780	1.0660	27.080
022	004-050	0.9890	25.120	0.0700	1.780	1.1290	28.680
023	004-050	1.0510	26.700	0.0700	1.780	1.1910	30.260
024	004-050	1.1140	28.300	0.0700	1.780	1.2540	31.860
025	004-050	1.1760	29.870	0.0700	1.780	1.3160	33.430
026	004-050	1.2390	31.470	0.0700	1.780	1.3790	35.030
027	004-050	1.3010	33.050	0.0700	1.780	1.4410	36.610
028	004-050	1.3640	34.650	0.0700	1.780	1.5040	38.210
029	004-050	1.4890	37.820	0.0700	1.780	1.6290	41.380
030	004-050	1.6140	41.000	0.0700	1.780	1.7540	44.560
031	004-050	1.7390	44.170	0.0700	1.780	1.8790	47.730
032	004-050	1.8640	47.350	0.0700	1.780	2.0040	50.910
033	004-050	1.9890	50.520	0.0700	1.780	2.1290	54.080
034	004-050	2.1140	53.700	0.0700	1.780	2.2540	57.260
035	004-050	2.2390	56.870	0.0700	1.780	2.3790	60.430
036	004-050	2.3640	60.050	0.0700	1.780	2.5040	63.610
037	004-050	2.4890	63.220	0.0700	1.780	2.6290	66.780
038	004-050	2.6140	66.400	0.0700	1.780	2.7540	69.960
039	004-050	2.7390	69.570	0.0700	1.780	2.8790	73.130
040	004-050	2.8640	72.750	0.0700	1.780	3.0040	76.310
041	004-050	2.9890	75.920	0.0700	1.780	3.1290	79.480
042	004-050	3.2390	82.270	0.0700	1.780	3.3790	85.830
043	004-050	3.4890	88.620	0.0700	1.780	3.6290	92.180
044	004-050	3.7390	94.970	0.0700	1.780	3.8790	98.530
045	004-050	3.9890	101.320	0.0700	1.780	4.1290	104.880
046	004-050	4.2390	107.670	0.0700	1.780	4.3790	111.230
047	004-050	4.4890	114.020	0.0700	1.780	4.6290	117.580
048	004-050	4.7390	120.370	0.0700	1.780	4.8790	123.930
049	004-050	4.9890	126.720	0.0700	1.780	5.1290	130.280
050	004-050	5.2390	133.070	0.0700	1.780	5.3790	136.630
102	102-178	0.0490	1.240	0.1030	2.620	0.2550	6.480
103	102-178	0.0810	2.060	0.1030	2.620	0.2870	7.300
104	102-178	0.1120	2.840	0.1030	2.620	0.3180	8.080
105	102-178	0.1430	3.630	0.1030	2.620	0.3490	8.870
106	102-178	0.1740	4.420	0.1030	2.620	0.3800	9.660
107	102-178	0.2060	5.230	0.1030	2.620	0.4120	10.470
108	102-178	0.2370	6.020	0.1030	2.620	0.4430	11.260
109	102-178	0.2990	7.590	0.1030	2.620	0.5050	12.830
110	102-178	0.3620	9.190	0.1030	2.620	0.5680	14.430
111	102-178	0.4240	10.770	0.1030	2.620	0.6300	16.010
112	102-178	0.4870	12.370	0.1030	2.620	0.6930	17.610
113	102-178	0.5490	13.940	0.1030	2.620	0.7550	19.180
114	102-178	0.6120	15.540	0.1030	2.620	0.8180	20.780
115	102-178	0.6740	17.120	0.1030	2.620	0.8800	22.360
116	102-178	0.7370	18.720	0.1030	2.620	0.9430	23.960
117	102-178	0.7990	20.290	0.1030	2.620	1.0050	25.530
118	102-178	0.8620	21.890	0.1030	2.620	1.0680	27.130
119	102-178	0.9240	23.470	0.1030	2.620	1.1300	28.710
120	102-178	0.9870	25.070	0.1030	2.620	1.1930	30.310
121	102-178	1.0490	26.640	0.1030	2.620	1.2550	31.880
122	102-178	1.1120	28.240	0.1030	2.620	1.3180	33.480
123	102-178	1.1740	29.820	0.1030	2.620	1.3800	35.060
124	102-178	1.2370	31.420	0.1030	2.620	1.4430	36.660
125	102-178	1.2990	32.990	0.1030	2.620	1.5050	38.230
126	102-178	1.3620	34.590	0.1030	2.620	1.5680	39.830
127	102-178	1.4240	36.170	0.1030	2.620	1.6300	41.410
128	102-178	1.4870	37.770	0.1030	2.620	1.6930	43.010
129	102-178	1.5490	39.340	0.1030	2.620	1.7550	44.580
130	102-178	1.6120	40.940	0.1030	2.620	1.8180	46.180
131	102-178	1.6740	42.520	0.1030	2.620	1.8800	47.760
132	102-178	1.7370	44.120	0.1030	2.620	1.9430	49.360
133	102-178	1.7990	45.690	0.1030	2.620	2.0050	50.930
134	102-178	1.8620	47.290	0.1030	2.620	2.0680	52.530
135	102-178	1.9250	48.900	0.1030	2.620	2.1310	54.140
136	102-178	1.9870	50.470	0.1030	2.620	2.1930	55.710
137	102-178	2.0500	52.070	0.1030	2.620	2.2560	57.310
138	102-178	2.1120	53.640	0.1030	2.620	2.3180	58.880
139	102-178	2.1750	55.250	0.1030	2.620	2.3810	60.490
140	102-178	2.2370	56.820	0.1030	2.620	2.4430	62.060
141	102-178	2.3000	58.420	0.1030	2.620	2.5060	63.660
142	102-178	2.3620	59.990	0.1030	2.620	2.5680	65.230
143	102-178	2.4250	61.600	0.1030	2.620	2.6310	66.840
144	102-178	2.4870	63.170	0.1030	2.620	2.6930	68.410
145	102-178	2.5500	64.770	0.1030	2.620	2.7560	70.010
146	102-178	2.6120	66.340	0.1030	2.620	2.8180	71.580
147	102-178	2.6750	67.950	0.1030	2.620	2.8810	73.190
148	102-178	2.7370	69.520	0.1030	2.620	2.9430	74.760
149	102-178	2.8000	71.120	0.1030	2.620	3.0060	76.360
150	102-178	2.8620	72.690	0.1030	2.620	3.0680	77.930
151	102-178	2.9870	75.870	0.1030	2.620	3.1930	81.110
152	102-178	3.2370	82.220	0.1030	2.620	3.4430	87.460
153	102-178	3.4870	88.570	0.1030	2.620	3.6930	93.810
154	102-178	3.7370	94.920	0.1030	2.620	3.9430	100.160
155	102-178	3.9870	101.270	0.1030	2.620	4.1930	106.510
156	102-178	4.2370	107.620	0.1030	2.620	4.4430	112.860
157	102-178	4.4870	113.970	0.1030	2.620	4.6930	119.210
158	102-178	4.7370	120.320	0.1030	2.620	4.9430	125.560
159	102-178	4.9870	126.670	0.1030	2.620	5.1930	131.910
160	102-178	5.2370	133.020	0.1030	2.620	5.4430	138.260
161	102-178	5.4870	139.370	0.1030	2.620	5.6930	144.610
162	102-178	5.7370	145.720	0.1030	2.620	5.9430	150.960
163	102-178	5.9870	152.070	0.1030	2.620	6.1930	157.310
164	102-178	6.2370	158.420	0.1030	2.620	6.4430	163.660
165	102-178	6.4870	164.770	0.1030	2.620	6.6930	170.010
166	102-178	6.7370	171.120	0.1030	2.620	6.9430	176.360
167	102-178	6.9870	177.470	0.1030	2.620	7.1930	182.710
168	102-178	7.2370	183.820	0.1030	2.620	7.4430	189.060
169	102-178	7.4870	190.170	0.1030	2.620	7.6930	195.410
170	102-178	7.7370	196.520	0.1030	2.620	7.9430	201.760
171	102-178	7.9870	202.870	0.1030	2.620	8.1930	208.110
172	102-178	8.2370	209.220	0.1030	2.620	8.4430	214.460
173	102-178	8.4870	215.570	0.1030	2.620	8.6930	220.810
174	102-178	8.7370	221.920	0.1030	2.620	8.9430	227.160
175	102-178	8.9870	228.270	0.1030	2.620	9.1930	233.510
176	102-178	9.2370	234.620	0.1030	2.620	9.4430	239.860
177	102-178	9.4870	240.970	0.1030	2.620	9.6930	246.210
178	102-178	9.7370	247.320	0.1030	2.620	9.9430	252.560
201	201-284	0.1710	4.340	0.1390	3.530	0.4490	11.400
202	201-284	0.2340	5.940	0.1390	3.530	0.5120	13.000
203	201-284	0.2960	7.520	0.1390	3.530	0.5740	14.580
204	201-284	0.3590	9.120	0.1390	3.530	0.6370	16.180
205	201-284	0.4210	10.690	0.1390	3.530	0.6990	17.750
206	201-284	0.4840	12.290	0.1390	3.530	0.7620	19.350
207	201-284	0.5460	13.870	0.1390	3.530	0.8240	20.930
208	201-284	0.6090	15.470	0.1390	3.530	0.8870	22.530
209	201-284	0.6710	17.040	0.1390	3.530	0.9490	24.100
210	201-284	0.7340	18.640	0.1390	3.530	1.0120	25.700
211	201-284	0.7960	20.220	0.1390	3.530	1.0740	27.280
212	201-284	0.8590	21.820	0.1390	3.530	1.1370	28.880
213	201-284	0.9210	23.390	0.1390	3.530	1.1990	30.450
214	201-284	0.9840	24.990	0.1390	3.530	1.2620	32.050
215	201-284	1.0460	26.570	0.1390	3.530	1.3240	33.630
216	201-284	1.1090	28.170	0.1390	3.530	1.3870	35.230
217	201-284	1.1710	29.740	0.1390	3.530	1.4490	36.800
218	201-284	1.2340	31.340	0.1390	3.530	1.5120	38.400
219	201-284	1.2960	32.920	0.1390	3.530	1.5740	39.980
220	201-284	1.3590	34.520	0.1390	3.530	1.6370	41.580
221	201-284	1.4210	36.090	0.1390	3.530	1.6990	43.150
222	201-284	1.4840	37.690	0.1390	3.530	1.7620	44.750
223	201-284	1.6090	40.870	0.1390	3.530	1.8870	47.930
224	201-284	1.7340	44.040	0.1390	3.530	2.0120	51.100
225	201-284	1.8590	47.220	0.1390	3.530	2.1370	54.280
226	201-284	1.9840	50.390	0.1390	3.530	2.2620	57.450
227	201-284	2.1090	53.570	0.1390	3.530	2.3870	60.630
228	201-284	2.2340	56.740	0.1390	3.530	2.5120	63.800
229	201-284	2.3590	59.920	0.1390	3.530	2.6370	66.980
230	201-284	2.4840	63.090	0.1390	3.530	2.7620	70.150
231	201-284	2.6090	66.270	0.1390	3.530	2.8870	73.330
232	201-284	2.7340	69.440	0.1390	3.530	3.0120	76.500
233	201-284	2.8590	72.620	0.1390	3.530	3.1370	79.680
234	201-284	2.9840	75.790	0.1390	3.530	3.2620	82.850
235	201-284	3.1090	78.970	0.1390	3.530	3.3870	86.030
236	201-284	3.2340	82.140	0.1390	3.530	3.5120	89.200
237	201-284	3.3590	85.320	0.1390	3.530	3.6370	92.380
238	201-284	3.4840	88.490	0.1390	3.530	3.7620	95.550
239	201-284	3.6090	91.670	0.1390	3.530	3.8870	98.730
240	201-284	3.7340	94.840	0.1390	3.530	4.0120	101.900
241	201-284	3.8590	98.020	0.1390	3.530	4.1370	105.080
242	201-284	3.9840	101.190	0.1390	3.530	4.2620	108.250
243	201-284	4.1090	104.370	0.1390	3.530	4.3870	111.430
244	201-284	4.2340	107.540	0.1390	3.530	4.5120	114.600
245	201-284	4.3590	110.720	0.1390	3.530	4.6370	117.780
246	201-284	4.4840	113.890	0.1390	3.530	4.7620	120.950
247	201-284	4.6090	117.070	0.1390	3.530	4.8870	124.130
248	201-284	4.7340	120.240	0.1390	3.530	5.0120	127.300
249	201-284	4.8590	123.420	0.1390	3.530	5.1370	130.480
250	201-284	4.9840	126.590	0.1390	3.530	5.2620	133.650
251	201-284	5.1090	129.770	0.1390	3.530	5.3870	136.830
252	201-284	5.2340	132.940	0.1390	3.530	5.5120	140.000
253	201-284	5.3590	136.120	0.1390	3.530	5.6370	143.180
254	201-284	5.4840	139.290	0.1390	3.530	5.7620	146.350
255	201-284	5.6090	142.470	0.1390	3.530	5.8870	149.530
256	201-284	5.7340	145.640	0.1390	3.530	6.0120	152.700
257	201-284	5.8590	148.820	0.1390	3.530	6.1370	155.880
258	201-284	5.9840	151.990	0.1390	3.530	6.2620	159.050
259	201-284	6.2340	158.340	0.1390	3.530	6.5120	165.400
260	201-284	6.4840	164.690	0.1390	3.530	6.7620	171.750
261	201-284	6.7340	171.040	0.1390	3.530	7.0120	178.100
262	201-284	6.9840	177.390	0.1390	3.530	7.2620	184.450
263	201-284	7.2340	183.740	0.1390	3.530	7.5120	190.800
264	201-284	7.4840	190.090	0.1390	3.530	7.7620	197.150
265	201-284	7.7340	196.440	0.1390	3.530	8.0120	203.500
266	201-284	7.9840	202.790	0.1390	3.530	8.2620	209.850
267	201-284	8.2340	209.140	0.1390	3.530	8.5120	216.200
268	201-284	8.4840	215.490	0.1390	3.530	8.7620	222.550
269	201-284	8.7340	221.840	0.1390	3.530	9.0120	228.900
270	201-284	8.9840	228.190	0.1390	3.530	9.2620	235.250
271	201-284	9.2340	234.540	0.1390	3.530	9.5120	241.600
272	201-284	9.4840	240.890	0.1390	3.530	9.7620	247.950
273	201-284	9.7340	247.240	0.1390	3.530	10.0120	254.300
274	201-284	9.9840	253.590	0.1390	3.530	10.2620	260.650
275	201-284	10.4840	266.290	0.1390	3.530	10.7620	273.350
276	201-284	10.9840	278.990	0.1390	3.530	11.2620	286.050
277	201-284	11.4840	291.690	0.1390	3.530	11.7620	298.750
278	201-284	11.9840	304.390	0.1390	3.530	12.2620	311.450
279	201-284	12.9840	329.790	0.1390	3.530	13.2620	336.850
280	201-284	13.9840	355.190	0.1390	3.530	14.2620	362.250
281	201-284	14.9840	380.590	0.1390	3.530	15.2620	387.650
282	201-284	15.9550	405.260	0.1390	3.530	16.2330	412.320
283	201-284	16.9550	430.660	0.1390	3.530	17.2330	437.720
284	201-284	17.9550	456.060	0.1390	3.530	18.2330	463.120
309	309-395	0.4120	10.460	0.2100	5.330	0.8320	21.120
310	309-395	0.4750	12.070	0.2100	5.330	0.8950	22.730
311	309-395	0.5370	13.640	0.2100	5.330	0.9570	24.300
312	309-395	0.6000	15.240	0.2100	5.330	1.0200	25.900
313	309-395	0.6620	16.810	0.2100	5.330	1.0820	27.470
314	309-395	0.7250	18.420	0.2100	5.330	1.1450	29.080
315	309-395	0.7870	19.990	0.2100	5.330	1.2070	30.650
316	309-395	0.8500	21.590	0.2100	5.330	1.2700	32.250
317	309-395	0.9120	23.160	0.2100	5.330	1.3320	33.820
318	309-395	0.9750	24.770	0.2100	5.330	1.3950	35.430
319	309-395	1.0370	26.340	0.2100	5.330	1.4570	37.000
320	309-395	1.1000	27.940	0.2100	5.330	1.5200	38.600
321	309-395	1.1620	29.510	0.2100	5.330	1.5820	40.170
322	309-395	1.2250	31.120	0.2100	5.330	1.6450	41.780
323	309-395	1.2870	32.690	0.2100	5.330	1.7070	43.350
324	309-395	1.3500	34.290	0.2100	5.330	1.7700	44.950
325	309-395	1.4750	37.470	0.2100	5.330	1.8950	48.130
326	309-395	1.6000	40.640	0.2100	5.330	2.0200	51.300
327	309-395	1.7250	43.820	0.2100	5.330	2.1450	54.480
328	309-395	1.8500	46.990	0.2100	5.330	2.2700	57.650
329	309-395	1.9750	50.170	0.2100	5.330	2.3950	60.830
330	309-395	2.1000	53.340	0.2100	5.330	2.5200	64.000
331	309-395	2.2250	56.520	0.2100	5.330	2.6450	67.180
332	309-395	2.3500	59.690	0.2100	5.330	2.7700	70.350
333	309-395	2.4750	62.870	0.2100	5.330	2.8950	73.530
334	309-395	2.6000	66.040	0.2100	5.330	3.0200	76.700
335	309-395	2.7250	69.220	0.2100	5.330	3.1450	79.880
336	309-395	2.8500	72.390	0.2100	5.330	3.2700	83.050
337	309-395	2.9750	75.570	0.2100	5.330	3.3950	86.230
338	309-395	3.1000	78.740	0.2100	5.330	3.5200	89.400
339	309-395	3.2250	81.920	0.2100	5.330	3.6450	92.580
340	309-395	3.3500	85.090	0.2100	5.330	3.7700	95.750
341	309-395	3.4750	88.270	0.2100	5.330	3.8950	98.930
342	309-395	3.6000	91.440	0.2100	5.330	4.0200	102.100
343	309-395	3.7250	94.620	0.2100	5.330	4.1450	105.280
344	309-395	3.8500	97.790	0.2100	5.330	4.2700	108.450
345	309-395	3.9750	100.970	0.2100	5.330	4.3950	111.630
346	309-395	4.1000	104.140	0.2100	5.330	4.5200	114.800
347	309-395	4.2250	107.320	0.2100	5.330	4.6450	117.980
348	309-395	4.3500	110.490	0.2100	5.330	4.7700	121.150
349	309-395	4.4750	113.670	0.2100	5.330	4.8950	124.330
350	309-395	4.6000	116.840	0.2100	5.330	5.0200	127.500
351	309-395	4.7250	120.020	0.2100	5.330	5.1450	130.680
352	309-395	4.8500	123.190	0.2100	5.330	5.2700	133.850
353	309-395	4.9750	126.370	0.2100	5.330	5.3950	137.030
354	309-395	5.1000	129.540	0.2100	5.330	5.5200	140.200
355	309-395	5.2250	132.720	0.2100	5.330	5.6450	143.380
356	309-395	5.3500	135.890	0.2100	5.330	5.7700	146.550
357	309-395	5.4750	139.070	0.2100	5.330	5.8950	149.730
358	309-395	5.6000	142.240	0.2100	5.330	6.0200	152.900
359	309-395	5.7250	145.420	0.2100	5.330	6.1450	156.080
360	309-395	5.8500	148.590	0.2100	5.330	6.2700	159.250
361	309-395	5.9750	151.770	0.2100	5.330	6.3950	162.430
362	309-395	6.2250	158.120	0.2100	5.330	6.6450	168.780
363	309-395	6.4750	164.470	0.2100	5.330	6.8950	175.130
364	309-395	6.7250	170.820	0.2100	5.330	7.1450	181.480
365	309-395	6.9750	177.170	0.2100	5.330	7.3950	187.830
366	309-395	7.2250	183.520	0.2100	5.330	7.6450	194.180
367	309-395	7.4750	189.870	0.2100	5.330	7.8950	200.530
368	309-395	7.7250	196.220	0.2100	5.330	8.1450	206.880
369	309-395	7.9750	202.570	0.2100	5.330	8.3950	213.230
370	309-395	8.2250	208.920	0.2100	5.330	8.6450	219.580
371	309-395	8.4750	215.270	0.2100	5.330	8.8950	225.930
372	309-395	8.7250	221.620	0.2100	5.330	9.1450	232.280
373	309-395	8.9750	227.970	0.2100	5.330	9.3950	238.630
374	309-395	9.2250	234.320	0.2100	5.330	9.6450	244.980
375	309-395	9.4750	240.670	0.2100	5.330	9.8950	251.330
376	309-395	9.7250	247.020	0.2100	5.330	10.1450	257.680
377	309-395	9.9750	253.370	0.2100	5.330	10.3950	264.030
378	309-395	10.4750	266.070	0.2100	5.330	10.8950	276.730
379	309-395	10.9750	278.770	0.2100	5.330	11.3950	289.430
380	309-395	11.4750	291.470	0.2100	5.330	11.8950	302.130
381	309-395	11.9750	304.170	0.2100	5.330	12.3950	314.830
382	309-395	12.9750	329.570	0.2100	5.330	13.3950	340.230
383	309-395	13.9750	354.970	0.2100	5.330	14.3950	365.630
384	309-395	14.9750	380.370	0.2100	5.330	15.3950	391.030
385	309-395	15.9550	405.260	0.2100	5.330	16.3750	415.920
386	309-395	16.9550	430.660	0.2100	5.330	17.3750	441.320
387	309-395	17.9550	456.060	0.2100	5.330	18.3750	466.720
388	309-395	18.9550	481.460	0.2100	5.330	19.3750	492.120
389	309-395	19.9550	506.860	0.2100	5.330	20.3750	517.520
390	309-395	20.9550	532.260	0.2100	5.330	21.3750	542.920
391	309-395	21.9550	557.660	0.2100	5.330	22.3750	568.320
392	309-395	22.9400	582.680	0.2100	5.330	23.3600	593.340
393	309-395	23.9400	608.080	0.2100	5.330	24.3600	618.740
394	309-395	24.9400	633.480	0.2100	5.330	25.3600	644.140
395	309-395	25.9400	658.880	0.2100	5.330	26.3600	669.540
425	425-475	4.4750	113.670	0.2750	6.990	5.0250	127.650
426	425-475	4.6000	116.840	0.2750	6.990	5.1500	130.820
427	425-475	4.7250	120.020	0.2750	6.990	5.2750	134.000
428	425-475	4.8500	123.190	0.2750	6.990	5.4000	137.170
429	425-475	4.9750	126.370	0.2750	6.990	5.5250	140.350
430	425-475	5.1000	129.540	0.2750	6.990	5.6500	143.520
431	425-475	5.2250	132.720	0.2750	6.990	5.7750	146.700
432	425-475	5.3500	135.890	0.2750	6.990	5.9000	149.870
433	425-475	5.4750	139.070	0.2750	6.990	6.0250	153.050
434	425-475	5.6000	142.240	0.2750	6.990	6.1500	156.220
435	425-475	5.7250	145.420	0.2750	6.990	6.2750	159.400
436	425-475	5.8500	148.590	0.2750	6.990	6.4000	162.570
437	425-475	5.9750	151.770	0.2750	6.990	6.5250	165.750
438	425-475	6.2250	158.120	0.2750	6.990	6.7750	172.100
439	425-475	6.4750	164.470	0.2750	6.990	7.0250	178.450
440	425-475	6.7250	170.820	0.2750	6.990	7.2750	184.800
441	425-475	6.9750	177.170	0.2750	6.990	7.5250	191.150
442	425-475	7.2250	183.520	0.2750	6.990	7.7750	197.500
443	425-475	7.4750	189.870	0.2750	6.990	8.0250	203.850
444	425-475	7.7250	196.220	0.2750	6.990	8.2750	210.200
445	425-475	7.9750	202.570	0.2750	6.990	8.5250	216.550
446	425-475	8.4750	215.270	0.2750	6.990	9.0250	229.250
447	425-475	8.9750	227.970	0.2750	6.990	9.5250	241.950
448	425-475	9.4750	240.670	0.2750	6.990	10.0250	254.650
449	425-475	9.9750	253.370	0.2750	6.990	10.5250	267.350
450	425-475	10.4750	266.070	0.2750	6.990	11.0250	280.050
451	425-475	10.9750	278.770	0.2750	6.990	11.5250	292.750
452	425-475	11.4750	291.470	0.2750	6.990	12.0250	305.450
453	425-475	11.9750	304.170	0.2750	6.990	12.5250	318.150
454	425-475	12.4750	316.870	0.2750	6.990	13.0250	330.850
455	425-475	12.9750	329.570	0.2750	6.990	13.5250	343.550
456	425-475	13.4750	342.270	0.2750	6.990	14.0250	356.250
457	425-475	13.9750	354.970	0.2750	6.990	14.5250	368.950
458	425-475	14.4750	367.670	0.2750	6.990	15.0250	381.650
459	425-475	14.9750	380.370	0.2750	6.990	15.5250	394.350
460	425-475	15.4750	393.070	0.2750	6.990	16.0250	407.050
461	425-475	15.9550	405.260	0.2750	6.990	16.5050	419.240
462	425-475	16.4550	417.960	0.2750	6.990	17.0050	431.940
463	425-475	16.9550	430.660	0.2750	6.990	17.5050	444.640
464	425-475	17.4550	443.360	0.2750	6.990	18.0050	457.340
465	425-475	17.9550	456.060	0.2750	6.990	18.5050	470.040
466	425-475	18.4550	468.760	0.2750	6.990	19.0050	482.740
467	425-475	18.9550	481.460	0.2750	6.990	19.5050	495.440
468	425-475	19.4550	494.160	0.2750	6.990	20.0050	508.140
469	425-475	19.9550	506.860	0.2750	6.990	20.5050	520.840
470	425-475	20.9550	532.260	0.2750	6.990	21.5050	546.240
471	425-475	21.9550	557.660	0.2750	6.990	22.5050	571.640
472	425-475	22.9400	582.680	0.2750	6.990	23.4900	596.660
473	425-475	23.9400	608.080	0.2750	6.990	24.4900	622.060
474	425-475	24.9400	633.480	0.2750	6.990	25.4900	647.460
475	425-475	25.9400	658.880	0.2750	6.990	26.4900	672.860

Dimensions are free-state, before installation; the outside diameter is ID + 2 × cross-section. Tolerances are on each size’s own page. Millimetre values are conversions of the AS568 inch dimensions — an AS568 size is not an ISO 3601 metric size.

Static Gland Depth by AS568 Cross-Section Series

Groove depth is set by the cross-section, not by the size, so one row serves a whole series. These are the static squeeze bands from MIL-G-5514G.

Static gland squeeze and depth by AS568 cross-section series
Property	Property	Property	Property	Gland depth
Series	Application	Cross-section, in	Squeeze, %	in	mm
004-050	Face seal, static	0.0700	19–32	0.0476–0.0567	1.209–1.440
004-050	Radial seal, static	0.0700	22–32	0.0476–0.0546	1.209–1.387
102-178	Face seal, static	0.1030	20–30	0.0721–0.0824	1.831–2.093
201-284	Face seal, static	0.1390	20–30	0.0973–0.1112	2.471–2.824
309-395	Face seal, static	0.2100	21–30	0.1470–0.1659	3.734–4.214
425-475	Face seal, static	0.2750	21–29	0.1953–0.2173	4.961–5.519

Static service only. Groove width, corner radius, diametral clearance, back-up ring dimensions and every dynamic application are outside this verified dataset — take those from the seal manufacturer's design chart rather than inferring them here.

Common Questions About AS568 O-Ring Sizes

What size is an AS568-214 o-ring?: AS568-214 is 0.9840 in (24.990 mm) inside diameter with a 0.1390 in (3.530 mm) cross-section, giving a 1.2620 in (32.050 mm) outside diameter.
How many AS568 o-ring sizes are there?: 349 standard dash numbers across 6 cross-section series, from AS568-001 at 0.0290 in inside diameter to AS568-395 at 25.9400 in. Every one is in the table on this page.
How do I measure an o-ring to find its dash number?: Measure the inside diameter and the cross-section free-state, then match both — the cross-section narrows the search to one series and the inside diameter finds the size within it. Sorting the chart on this page by cross-section and then reading down the inside-diameter column does the same job.
What gland depth does an AS568 o-ring need?: Gland depth follows the cross-section, so every size in a series shares one groove depth. This chart carries 6 verified static gland rules from MIL-G-5514G, listed in the gland table on this page; dynamic service has no verified band in this dataset and none is shown.

Sources and Method for This AS568 O-Ring Chart

SAE AS568 o-ring sizes and gland designcomputed+compiled

bd_warehouse o-ring_parameters.csv (Apache-2.0) + KasperCalc oring-sizes.js (MIT), agreeing on all 349 sizes; OD computed; gland depth computed from squeeze %

Verified against o-rings: 21 checks passed across 3 harness(es)

Part computed from the standard's formulas, part compiled from agreeing public sources.

Gland designcomputed

MIL-G-5514G (public domain) gland design criteria; squeeze-percentage bands cross-read from Parker O-Ring Handbook ORD-5700 Design Charts 4-2/4-3 (verification only); depth = CS - CS x squeeze%

Verified against computed depth band brackets the published design-chart band for every series

Computed from the standard's formulas, then checked against published tables.

Formula

Outside diameter

OD  =  ID + 2 × CS

Static gland depth

depth  =  CS − (CS × squeeze%)

Assumptions

Dimensions are free-state, at room temperature, before installation.
Metric figures are exact conversions of the AS568 inch dimensions (1 in = 25.4 mm), not ISO 3601 metric sizes.
Gland data is static only, and the 001-003 micro band has no verified squeeze rule in this dataset.
Dataset scope: A fabricated-dataset negative control is asserted against on every run. EXCLUDED: groove width, corner radius, diametral clearance, back-up ring widths, surface finish, all dynamic glands, the 900-series, and ISO 3601 metric sizes.

Data last verified

August 1, 2026

How this data is built and checked →

How to Cite This AS568 O-Ring Size Chart

Citation

ShopMath. "AS568 O-Ring Size Chart — Every Dash Number, Inch and Metric." ShopMath, verified August 1, 2026, https://shopmath.org/charts/o-ring-sizes

BibTeX

@misc{shopmath-charts-o-ring-sizes,
  title        = {AS568 O-Ring Size Chart — Every Dash Number, Inch and Metric},
  author       = {{ShopMath}},
  year         = {2026},
  howpublished = {\url{https://shopmath.org/charts/o-ring-sizes}},
  note         = {Data verified 2026-08-01}
}

Permanent URL

https://shopmath.org/charts/o-ring-sizes

Every AS568 series · 001-003 index · 004-050 index · 102-178 index · 201-284 index · 309-395 index · 425-475 index