Common sizes · AS568 and metric

Popular O-ring sizes

Commonly ordered AS568 and metric O-ring sizes for repairs, maintenance and small-pack orders, grouped by cross-section. Pick a size, then choose material, hardness and pack size on the results page.

Series

CS in mm · materials = families we list at that exact size

AS568 -0xx series CS 1.78 mm · 0.070 in

13 common sizes

AS568 -0xx series, 1.78 mm cross-section: dash number, nominal ID × CS in mm and inches, and the material families listed
Dash	ID × CS mm	ID × CS in	Materials available	View sizes
-006	2.90 × 1.78	0.114 × 0.070	NBRFKMEPDMVMQFFKM17 grades	View grades
-008	4.47 × 1.78	0.176 × 0.070	NBRFKMVMQFFKM4 grades	View grades
-010	6.07 × 1.78	0.239 × 0.070	NBRFKMEPDMVMQFFKM15 grades	View grades
-011	7.65 × 1.78	0.301 × 0.070	NBRFKMEPDMVMQFFKM11 grades	View grades
-012	9.25 × 1.78	0.364 × 0.070	NBRFKMEPDMVMQFFKM16 grades	View grades
-013	10.82 × 1.78	0.426 × 0.070	NBRFKMEPDMVMQFFKM15 grades	View grades
-014	12.42 × 1.78	0.489 × 0.070	NBRFKMEPDMVMQFFKM16 grades	View grades
-015	14.00 × 1.78	0.551 × 0.070	NBRFKMEPDMVMQFFKM15 grades	View grades
-016	15.60 × 1.78	0.614 × 0.070	NBRFKMEPDMVMQFFKM17 grades	View grades
-018	18.77 × 1.78	0.739 × 0.070	NBRFKMEPDMVMQFFKM16 grades	View grades
-020	21.95 × 1.78	0.864 × 0.070	NBRFKMEPDMVMQFFKM15 grades	View grades
-022	25.12 × 1.78	0.989 × 0.070	NBRFKMEPDMVMQFFKM16 grades	View grades
-024	28.30 × 1.78	1.114 × 0.070	NBRFKMEPDMVMQFFKM17 grades	View grades

AS568 -1xx series CS 2.62 mm · 0.103 in

13 common sizes

AS568 -1xx series, 2.62 mm cross-section: dash number, nominal ID × CS in mm and inches, and the material families listed
Dash	ID × CS mm	ID × CS in	Materials available	View sizes
-110	9.19 × 2.62	0.362 × 0.103	NBRFKMEPDMVMQFFKM16 grades	View grades
-111	10.77 × 2.62	0.424 × 0.103	NBRFKMEPDMVMQFFKM10 grades	View grades
-112	12.37 × 2.62	0.487 × 0.103	NBRFKMEPDMVMQFFKM16 grades	View grades
-113	13.94 × 2.62	0.549 × 0.103	NBRFKMEPDMVMQFFKM10 grades	View grades
-114	15.54 × 2.62	0.612 × 0.103	NBRFKMEPDMVMQFFKM17 grades	View grades
-115	17.12 × 2.62	0.674 × 0.103	NBRFKMEPDMVMQFFKM11 grades	View grades
-116	18.72 × 2.62	0.737 × 0.103	NBRFKMEPDMVMQFFKM16 grades	View grades
-118	21.89 × 2.62	0.862 × 0.103	NBRFKMEPDMVMQFFKM17 grades	View grades
-120	25.07 × 2.62	0.987 × 0.103	NBRFKMEPDMVMQFFKM17 grades	View grades
-123	29.82 × 2.62	1.174 × 0.103	NBRFKMEPDMVMQFFKM16 grades	View grades
-126	34.59 × 2.62	1.362 × 0.103	NBRFKMEPDMVMQFFKM16 grades	View grades
-130	40.94 × 2.62	1.612 × 0.103	NBRFKMEPDMVMQ4 grades	View grades
-135	48.90 × 2.62	1.925 × 0.103	NBRFKMEPDMVMQFFKM16 grades	View grades

AS568 -2xx series CS 3.53 mm · 0.139 in

12 common sizes

AS568 -2xx series, 3.53 mm cross-section: dash number, nominal ID × CS in mm and inches, and the material families listed
Dash	ID × CS mm	ID × CS in	Materials available	View sizes
-210	18.64 × 3.53	0.734 × 0.139	NBRFKMEPDMVMQFFKM15 grades	View grades
-212	21.82 × 3.53	0.859 × 0.139	NBRFKMEPDMVMQFFKM18 grades	View grades
-214	24.99 × 3.53	0.984 × 0.139	NBRFKMEPDMVMQFFKM17 grades	View grades
-216	28.17 × 3.53	1.109 × 0.139	NBRFKMEPDMVMQFFKM18 grades	View grades
-218	31.34 × 3.53	1.234 × 0.139	NBRFKMEPDMVMQFFKM17 grades	View grades
-220	34.52 × 3.53	1.359 × 0.139	NBRFKMEPDMVMQFFKM17 grades	View grades
-222	37.69 × 3.53	1.484 × 0.139	NBRFKMEPDMVMQFFKM16 grades	View grades
-225	47.22 × 3.53	1.859 × 0.139	NBRFKMEPDMVMQFFKM16 grades	View grades
-228	56.74 × 3.53	2.234 × 0.139	NBRFKMEPDMVMQFFKM16 grades	View grades
-232	69.44 × 3.53	2.734 × 0.139	NBRFKMEPDMVMQFFKM15 grades	View grades
-236	82.14 × 3.53	3.234 × 0.139	NBRFKMEPDMVMQFFKM16 grades	View grades
-240	94.84 × 3.53	3.734 × 0.139	NBRFKMEPDMVMQFFKM15 grades	View grades

AS568 -3xx series CS 5.33 mm · 0.210 in

4 common sizes

AS568 -3xx series, 5.33 mm cross-section: dash number, nominal ID × CS in mm and inches, and the material families listed
Dash	ID × CS mm	ID × CS in	Materials available	View sizes
-325	37.47 × 5.33	1.475 × 0.210	NBRFKMEPDMVMQFFKM16 grades	View grades
-330	53.34 × 5.33	2.100 × 0.210	NBRFKMEPDMVMQFFKM14 grades	View grades
-335	69.22 × 5.33	2.725 × 0.210	NBRFKMEPDMVMQFFKM15 grades	View grades
-340	85.09 × 5.33	3.350 × 0.210	NBRFKMEPDMVMQFFKM15 grades	View grades

AS568 -4xx series CS 6.99 mm · 0.275 in

8 common sizes

AS568 -4xx series, 6.99 mm cross-section: dash number, nominal ID × CS in mm and inches, and the material families listed
Dash	ID × CS mm	ID × CS in	Materials available	View sizes
-425	113.67 × 6.99	4.475 × 0.275	NBRFKMEPDMVMQFFKM16 grades	View grades
-426	116.84 × 6.99	4.600 × 0.275	NBRFKMEPDMVMQFFKM15 grades	View grades
-428	123.19 × 6.99	4.850 × 0.275	NBRFKMEPDMVMQFFKM13 grades	View grades
-430	129.54 × 6.99	5.100 × 0.275	NBRFKMEPDMVMQFFKM15 grades	View grades
-434	142.24 × 6.99	5.600 × 0.275	NBRFKMEPDMVMQFFKM15 grades	View grades
-438	158.12 × 6.99	6.225 × 0.275	NBRFKMEPDMVMQFFKM16 grades	View grades
-444	196.22 × 6.99	7.725 × 0.275	NBRFKMEPDMVMQFFKM16 grades	View grades
-447	227.97 × 6.99	8.975 × 0.275	NBRFKMEPDMVMQFFKM15 grades	View grades

Metric sizes CS 1–5 mm

28 common ID × CS sizes in whole millimetres

Common metric O-ring sizes: nominal ID × CS in mm and inches, and the material families listed
ID × CS mm	ID × CS in	Materials available	View sizes
5.00 × 1.00	0.197 × 0.039	NBRFKMEPDMVMQFFKM13 grades	View grades
6.00 × 1.50	0.236 × 0.059	NBRFKMEPDMVMQFFKM11 grades	View grades
8.00 × 1.50	0.315 × 0.059	NBRFKMEPDMVMQFFKM11 grades	View grades
8.00 × 2.00	0.315 × 0.079	NBRFKMEPDMVMQFFKM14 grades	View grades
10.00 × 1.50	0.394 × 0.059	NBRFKMEPDMVMQFFKM11 grades	View grades
10.00 × 2.00	0.394 × 0.079	NBRFKMEPDMVMQFFKM11 grades	View grades
12.00 × 2.00	0.472 × 0.079	NBRFKMEPDMVMQFFKM13 grades	View grades
14.00 × 2.00	0.551 × 0.079	NBRFKMEPDMVMQFFKM12 grades	View grades
15.00 × 2.00	0.591 × 0.079	NBRFKMEPDMVMQFFKM13 grades	View grades
16.00 × 2.00	0.630 × 0.079	NBRFKMEPDMVMQFFKM13 grades	View grades
18.00 × 2.00	0.709 × 0.079	NBRFKMEPDMVMQFFKM13 grades	View grades
20.00 × 2.00	0.787 × 0.079	NBRFKMEPDMVMQFFKM12 grades	View grades
20.00 × 2.50	0.787 × 0.098	NBRFKMEPDMVMQFFKM10 grades	View grades
22.00 × 2.50	0.866 × 0.098	NBRFKMEPDMVMQFFKM11 grades	View grades
25.00 × 2.50	0.984 × 0.098	NBRFKMEPDMVMQFFKM10 grades	View grades
25.00 × 3.00	0.984 × 0.118	NBRFKMEPDMVMQFFKM12 grades	View grades
28.00 × 3.00	1.102 × 0.118	NBRFKMEPDMVMQFFKM10 grades	View grades
30.00 × 3.00	1.181 × 0.118	NBRFKMEPDMVMQFFKM11 grades	View grades
32.00 × 3.00	1.260 × 0.118	NBRFKMEPDMVMQFFKM11 grades	View grades
35.00 × 3.00	1.378 × 0.118	NBRFKMEPDMVMQFFKM9 grades	View grades
40.00 × 3.00	1.575 × 0.118	NBRFKMEPDMVMQFFKM11 grades	View grades
45.00 × 3.00	1.772 × 0.118	NBRFKMEPDMVMQFFKM10 grades	View grades
50.00 × 3.00	1.969 × 0.118	NBRFKMEPDMVMQFFKM11 grades	View grades
50.00 × 4.00	1.969 × 0.157	NBRFKMEPDMVMQFFKM11 grades	View grades
60.00 × 4.00	2.362 × 0.157	NBRFKMEPDMVMQFFKM9 grades	View grades
70.00 × 4.00	2.756 × 0.157	NBRFKMEPDMVMQFFKM10 grades	View grades
80.00 × 5.00	3.150 × 0.197	NBRFKMEPDMVMQFFKM10 grades	View grades
100.00 × 5.00	3.937 × 0.197	NBRFKMEPDMVMQFFKM10 grades	View grades

Dimensions are nominal, from public size references. AS568 inch values are the dash-number nominal sizes; metric inch values are converted (1 in = 25.4 mm). Grade counts are the material and hardness combinations we list at exactly that size.

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Need help measuring?Size guide: ID, CS and the common errors. Not sure about material?Material guide: NBR, FKM, EPDM, silicone, FFKM. Need 100+ pieces or a kit?Tell us the size range, material and quantity.

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