O-RING SIZE CHART

Standard metric sizes (DIN 3771) are specified by the ID x CS as defined in the German Institute of Standards. It might also be followed by a letter indicating the quality level (N: normal quality or S: special quality). When ordering standard sizes, all you need to specify is the ID x CS, followed by the material, hardness and color (for example, 15 x 1.8 NBR 70 Black).

In case you prefer imperial O-ring sizes, please refer to our AS 568A standard O-ring size chart.

DIN 3771

ID: Inner Diameter
CS: Cross Section

NO. CS [mm] ID [mm] CS [inch] ID [inch]
1.8 × 1.8 (1.8X1.8) 1.8 1.8 0.071 0.071
2 × 1.8 (2X1.8) 1.8 2 0.071 0.079
2.24 × 1.8 (2.24X1.8) 1.8 2.24 0.071 0.088
2.5 × 1.8 (2.5X1.8) 1.8 2.5 0.071 0.098
2.8 × 1.8 (2.8X1.8) 1.8 2.8 0.071 0.11
3.15 × 1.8 (3.15X1.8) 1.8 3.15 0.071 0.124
3.55 × 1.8 (3.55X1.8) 1.8 3.55 0.071  0.14 
3.75 × 1.8 (3.75X1.8) 1.8 3.75 0.071  0.148 
4 × 1.8 (4X1.8) 1.8 4 0.071  0.157 
4.5 × 1.8 (4.5X1.8) 1.8 4.5 0.071  0.177 
4.87 × 1.8 (4.87X1.8) 1.8 4.87 0.071  0.192 
5 × 1.8 (5X1.8) 1.8 5 0.071  0.197 
5.15 × 1.8 (5.15X1.8) 1.8 5.15 0.071  0.203 
5.3 × 1.8 (5.3X1.8) 1.8 5.3 0.071  0.209 
5.6 × 1.8 (5.6X1.8) 1.8 5.6 0.071  0.22 
6 × 1.8 (6X1.8) 1.8 6 0.071  0.236 
6.3 × 1.8 (6.3X1.8) 1.8 6.3 0.071  0.248 
6.7 × 1.8 (6.7X1.8) 1.8 6.7 0.071  0.264 
6.9 × 1.8 (6.9X1.8) 1.8 6.9 0.071  0.272 
7.1 × 1.8 (7.1X1.8) 1.8 7.1 0.071  0.28 
7.5 × 1.8 (7.5X1.8) 1.8 7.5 0.071  0.295 
8 × 1.8 (8X1.8) 1.8 8 0.071  0.315 
8.5 × 1.8 (8.5X1.8) 1.8 8.5 0.071  0.335 
8.75 × 1.8 (8.75X1.8) 1.8 8.75 0.071  0.344 
9 × 1.8 (9X1.8) 1.8 9 0.071  0.354 
9.5 × 1.8 (9.5X1.8) 1.8 9.5 0.071  0.374 
10 × 1.8 (10X1.8) 1.8 10 0.071  0.394 
10.6 × 1.8 (10.6X1.8) 1.8 10.6 0.071  0.417 
11.2 × 1.8 (11.2X1.8) 1.8 11.2 0.071  0.441 
11.8 × 1.8 (11.8X1.8) 1.8 11.8 0.071  0.465 
12.5 × 1.8 (12.5X1.8) 1.8 12.5 0.071  0.492 
13.2 × 1.8 (13.2X1.8) 1.8 13.2 0.071  0.52 
14 × 1.8 (14X1.8) 1.8 14 0.071 0.551 
15 × 1.8 (15X1.8) 1.8 15 0.071  0.591 
16 × 1.8 (16X1.8) 1.8 16 0.071  0.63 
17 × 1.8 (17X1.8) 1.8 17 0.071  0.669 
14 × 2.65 (14X2.65) 2.65 14 0.104  0.551 
15 × 2.65 (15X2.65) 2.65 15 0.104  0.591 
16 × 2.65 (16X2.65) 2.65 16 0.104  0.63 
17 × 2.65 (17X2.65) 2.65 17 0.104  0.669 
18 × 2.65 (18X2.65) 2.65 18 0.104  0.709 
19 × 2.65 (19X2.65) 2.65 19 0.104  0.748 
20 × 2.65 (20X2.65) 2.65 20 0.104  0.787 
21.2 × 2.65 (21.2X2.65) 2.65 21.2 0.104  0.835 
22.4 × 2.65 (22.4X2.65) 2.65 22.4 0.104  0.882 
23.6 × 2.65 (23.6X2.65) 2.65 23.6 0.104  0.929 
25 × 2.65 (25X2.65) 2.65 25 0.104  0.984 
25.8 × 2.65 (25.8X2.65) 2.65 25.8 0.104  1.016 
26.5 × 2.65 (26.5X2.65) 2.65 26.5 0.104  1.043 
28 × 2.65 (28X2.65) 2.65 28 0.104  1.102 
30 × 2.65 (30X2.65) 2.65 30 0.104  1.181 
31.5 × 2.65 (31.5X2.65) 2.65 31.5 0.104  1.24 
32.5 × 2.65 (32.5X2.65) 2.65 32.5 0.104  1.28 
33.5 × 2.65 (33.5X2.65) 2.65 33.5 0.104  1.319 
34.5 × 2.65 (34.5X2.65) 2.65 34.5 0.104  1.358 
35.5 × 2.65 (35.5X2.65) 2.65 35.5 0.104  1.398 
36.5 × 2.65 (36.5X2.65) 2.65 36.5 0.104  1.437 
37.5 × 2.65 (37.5X2.65) 2.65 37.5 0.104  1.476 
38.7 × 2.65 (38.7X2.65) 2.65 38.7 0.104  1.524 
18 × 3.55 (18X3.55) 3.55 18 0.14  0.709 
19 × 3.55 (19X3.55) 3.55 19 0.14  0.748 
20 × 3.55 (20X3.55) 3.55 20 0.14  0.787 
21.2 × 3.55 (21.2X3.55) 3.55 21.2 0.14  0.835 
22.4 × 3.55 (22.4X3.55) 3.55 22.4 0.14  0.882 
23.6 × 3.55 (23.6X3.55) 3.55 23.6 0.14  0.929 
25 × 3.55 (25X3.55) 3.55 25 0.14  0.984 
25.8 × 3.55 (25.8X3.55) 3.55 25.8 0.14  1.016 
26.5 × 3.55 (26.5X3.55) 3.55 26.5 0.14  1.043 
28 × 3.55 (28X3.55) 3.55 28 0.14  1.102 
30 × 3.55 (30X3.55) 3.55 30 0.14  1.181 
31.5 × 3.55 (31.5X3.55) 3.55 31.5 0.14  1.24 
32.5 × 3.55 (32.5X3.55) 3.55 32.5 0.14  1.28 
33.5 × 3.55 (33.5X3.55) 3.55 33.5 0.14  1.319 
34.5 × 3.55 (34.5X3.55) 3.55 34.5 0.14  1.358 
35.5 × 3.55 (35.5X3.55) 3.55 35.5 0.14  1.398 
36.5 × 3.55 (36.5X3.55) 3.55 36.5 0.14  1.437 
37.5 × 3.55 (37.5X3.55) 3.55 37.5 0.14  1.476 
38.7 × 3.55 (38.7X3.55) 3.55 38.7 0.14  1.524 
40 × 3.55 (40X3.55) 3.55 40 0.14  1.575 
41.2 × 3.55 (41.2X3.55) 3.55 41.2 0.14  1.622 
42.5 × 3.55 (42.5X3.55) 3.55 42.5 0.14  1.673 
43.7 × 3.55 (43.7X3.55) 3.55 43.7 0.14  1.72 
45 × 3.55 (45X3.55) 3.55 45 0.14  1.772 
46.2 × 3.55 (46.2X3.55) 3.55 46.2 0.14  1.819 
47.5 × 3.55 (47.5X3.55) 3.55 47.5 0.14  1.87 
48.7 × 3.55 (48.7X3.55) 3.55 48.7 0.14  1.917 
50 × 3.55 (50X3.55) 3.55 50 0.14  1.969 
51.5 × 3.55 (51.5X3.55) 3.55 51.5 0.14  2.028 
53 × 3.55 (53X3.55) 3.55 53 0.14  2.087 
54.5 × 3.55 (54.5X3.55) 3.55 54.5 0.14  2.146 
56 × 3.55 (56X3.55) 3.55 56 0.14  2.205 
58 × 3.55 (58X3.55) 3.55 58 0.14  2.283 
60 × 3.55 (60X3.55) 3.55 60 0.14  2.362 
61.5 × 3.55 (61.5X3.55) 3.55 61.5 0.14  2.421 
63 × 3.55 (63X3.55) 3.55 63 0.14  2.48 
65 × 3.55 (65X3.55) 3.55 65 0.14  2.559 
67 × 3.55 (67X3.55) 3.55 67 0.14  2.638 
69 × 3.55 (69X3.55) 3.55 69 0.14  2.717 
71 × 3.55 (71X3.55) 3.55 71 0.14  2.795 
73 × 3.55 (73X3.55) 3.55 73 0.14  2.874 
75 × 3.55 (75X3.55) 3.55 75 0.14  2.953 
77.5 × 3.55 (77.5X3.55) 3.55 77.5 0.14  3.051 
80 × 3.55 (80X3.55) 3.55 80 0.14  3.15 
82.5 × 3.55 (82.5X3.55) 3.55 82.5 0.14  3.248 
85 × 3.55 (85X3.55) 3.55 85 0.14  3.346 
87.5 × 3.55 (87.5X3.55) 3.55 87.5 0.14  3.445 
90 × 3.55 (90X3.55) 3.55 90 0.14  3.543 
92.5 × 3.55 (92.5X3.55) 3.55 92.5 0.14  3.642 
95 × 3.55 (95X3.55) 3.55 95 0.14  3.74 
97.5 × 3.55 (97.5X3.55) 3.55 97.5 0.14  3.839 
100 × 3.55 (100X3.55) 3.55 100 0.14  3.937 
103 × 3.55 (103X3.55) 3.55 103 0.14  4.055 
106 × 3.55 (106X3.55) 3.55 106 0.14  4.173 
109 × 3.55 (109X3.55) 3.55 109 0.14  4.291 
112 × 3.55 (112X3.55) 3.55 112 0.14  4.409 
115 × 3.55 (115X3.55) 3.55 115 0.14  4.528 
118 × 3.55 (118X3.55) 3.55 118 0.14  4.646 
122 × 3.55 (122X3.55) 3.55 122 0.14  4.803 
125 × 3.55 (125X3.55) 3.55 125 0.14  4.921 
128 × 3.55 (128X3.55) 3.55 128 0.14  5.039 
132 × 3.55 (132X3.55) 3.55 132 0.14  5.197 
136 × 3.55 (136X3.55) 3.55 136 0.14  5.354 
140 × 3.55 (140X3.55) 3.55 140 0.14  5.512 
145 × 3.55 (145X3.55) 3.55 145 0.14  5.709 
150 × 3.55 (150X3.55) 3.55 150 0.14  5.906 
155 × 3.55 (155X3.55) 3.55 155 0.14  6.102 
160 × 3.55 (160X3.55) 3.55 160 0.14  6.299 
165 × 3.55 (165X3.55) 3.55 165 0.14  6.496 
170 × 3.55 (170X3.55) 3.55 170 0.14  6.693 
175 × 3.55 (175X3.55) 3.55 175 0.14  6.89 
180 × 3.55 (180X3.55) 3.55 180 0.14  7.087 
185 × 3.55 (185X3.55) 3.55 185 0.14  7.283 
190 × 3.55 (190X3.55) 3.55 190 0.14  7.48 
195 × 3.55 (195X3.55) 3.55 195 0.14  7.677 
200 × 3.55 (200X3.55) 3.55 200 0.14  7.874 
40 × 5.3 (40X5.3) 5.3 40 0.209  1.575 
41.2 × 5.3 (41.2X5.3) 5.3 41.2 0.209  1.622 
42.5 × 5.3 (42.5X5.3) 5.3 42.5 0.209  1.673 
43.7 × 5.3 (43.7X5.3) 5.3 43.7 0.209  1.72 
45 × 5.3 (45X5.3) 5.3 45 0.209  1.772 
46.2 × 5.3 (46.2X5.3) 5.3 46.2 0.209  1.819 
47.5 × 5.3 (47.5X5.3) 5.3 47.5 0.209  1.87 
48.7 × 5.3 (48.7X5.3) 5.3 48.7 0.209  1.917 
50 × 5.3 (50X5.3) 5.3 50 0.209  1.969 
51.5 × 5.3 (51.5X5.3) 5.3 51.5 0.209  2.028 
53 × 5.3 (53X5.3) 5.3 53 0.209  2.087 
54.5 × 5.3 (54.5X5.3) 5.3 54.5 0.209  2.146 
56 × 5.3 (56X5.3) 5.3 56 0.209  2.205 
58 × 5.3 (58X5.3) 5.3 58 0.209  2.283 
60 × 5.3 (60X5.3) 5.3 60 0.209  2.362 
61.5 × 5.3 (61.5X5.3) 5.3 61.5 0.209  2.421 
63 × 5.3 (63X5.3) 5.3 63 0.209  2.48 
65 × 5.3 (65X5.3) 5.3 65 0.209  2.559 
67 × 5.3 (67X5.3) 5.3 67 0.209  2.638 
69 × 5.3 (69X5.3) 5.3 69 0.209  2.717 
71 × 5.3 (71X5.3) 5.3 71 0.209  2.795 
73 × 5.3 (73X5.3) 5.3 73 0.209  2.874 
75 × 5.3 (75X5.3) 5.3 75 0.209  2.953 
77.5 × 5.3 (77.5X5.3) 5.3 77.5 0.209  3.051 
80 × 5.3 (80X5.3) 5.3 80 0.209  3.15 
82.5 × 5.3 (82.5X5.3) 5.3 82.5 0.209  3.248 
85 × 5.3 (85X5.3) 5.3 85 0.209  3.346 
87.5 × 5.3 (87.5X5.3) 5.3 87.5 0.209  3.445 
90 × 5.3 (90X5.3) 5.3 90 0.209  3.543 
92.5 × 5.3 (92.5X5.3) 5.3 92.5 0.209  3.642 
95 × 5.3 (95X5.3) 5.3 95 0.209  3.74 
97.5 × 5.3 (97.5X5.3) 5.3 97.5 0.209  3.829 
100 × 5.3 (100X5.3) 5.3 100 0.209  3.937 
103 × 5.3 (103X5.3) 5.3 103 0.209  4.055 
106 × 5.3 (106X5.3) 5.3 106 0.209  4.173 
109 × 5.3 (109X5.3) 5.3 109 0.209  4.291 
112 × 5.3 (112X5.3) 5.3 112 0.209  4.409 
115 × 5.3 (115X5.3) 5.3 115 0.209  4.528 
118 × 5.3 (118X5.3) 5.3 118 0.209  4.646 
122 × 5.3 (122X5.3) 5.3 122 0.209  4.803 
125 × 5.3 (125X5.3) 5.3 125 0.209  4.921 
128 × 5.3 (128X5.3) 5.3 128 0.209  5.039 
132 × 5.3 (132X5.3) 5.3 132 0.209  5.1971 
136 × 5.3 (136X5.3) 5.3 136 0.209  5.354 
140 × 5.3 (140X5.3) 5.3 140 0.209  5.5121 
145 × 5.3 (145X5.3) 5.3 145 0.209  5.709 
150 × 5.3 (150X5.3) 5.3 150 0.209  5.906 
155 × 5.3 (155X5.3) 5.3 155 0.209  6.1021 
160 × 5.3 (160X5.3) 5.3 160 0.209  6.299 
165 × 5.3 (165X5.3) 5.3 165 0.209  6.496 
170 × 5.3 (170X5.3) 5.3 170 0.209  6.6931 
175 × 5.3 (175X5.3) 5.3 175 0.209  6.89 
180 × 5.3 (180X5.3) 5.3 180 0.209  7.0871 
185 × 5.3 (185X5.3) 5.3 185 0.209  7.2831 
190 × 5.3 (190X5.3) 5.3 190 0.209  7.48 
195 × 5.3 (195X5.3) 5.3 195 0.209  7.677 
200 × 5.3 (200X5.3) 5.3 200 0.209  7.8741 
206 × 5.3 (206X5.3) 5.3 206 0.209  8.1101 
212 × 5.3 (212X5.3) 5.3 212 0.209  8.346 
218 × 5.3 (218X5.3) 5.3 218 0.209  8.583 
224 × 5.3 (224X5.3) 5.3 224 0.209  8.819 
230 × 5.3 (230X5.3) 5.3 230 0.209  9.055 
236 × 5.3 (236X5.3) 5.3 236 0.209  9.291 
243 × 5.3 (243X5.3) 5.3 243 0.209  9.567 
250 × 5.3 (250X5.3) 5.3 250 0.209  9.843 
258 × 5.3 (258X5.3) 5.3 258 0.209  10.157 
265 × 5.3 (265X5.3) 5.3 265 0.209  10.433 
272 × 5.3 (272X5.3) 5.3 272 0.209  10.709 
280 × 5.3 (280X5.3) 5.3 280 0.209  11.024 
290 × 5.3 (290X5.3) 5.3 290 0.209  11.417 
300 × 5.3 (300X5.3) 5.3 300 0.209  11.811 
307 × 5.3 (307X5.3) 5.3 307 0.209  12.087 
315 × 5.3 (315X5.3) 5.3 315 0.209  12.402 
325 × 5.3 (325X5.3) 5.3 325 0.209  12.795 
335 × 5.3 (335X5.3) 5.3 335 0.209  13.189 
345 × 5.3 (345X5.3) 5.3 345 0.209  13.583 
355 × 5.3 (355X5.3) 5.3 355 0.209  13.976 
365 × 5.3 (365X5.3) 5.3 365 0.209  14.37 
375 × 5.3 (375X5.3) 5.3 375 0.209  14.764 
387 × 5.3 (387X5.3) 5.3 387 0.209  15.236 
400 × 5.3 (400X5.3) 5.3 400 0.209  15.748 
206 × 7 (206X7) 7 206 0.276  8.11 
212 × 7 (212X7) 7 212 0.276  8.3461 
218 × 7 (218X7) 7 218 0.276  8.583 
224 × 7 (224X7) 7 224 0.276  8.819 
230 × 7 (230X7) 7 230 0.276  9.055 
236 × 7 (236X7) 7 236 0.276  9.291 
243 × 7 (243X7) 7 243 0.276  9.567 
250 × 7 (250X7) 7 250 0.276  9.843 
258 × 7 (258X7) 7 258 0.276  10.157 
265 × 7 (265X7) 7 265 0.276  10.433 
272 × 7 (272X7) 7 272 0.276  10.709 
280 × 7 (280X7) 7 280 0.276  11.024 
290 × 7 (290X7) 7 290 0.276  11.417 
300 × 7 (300X7) 7 300 0.276  11.811 
307 × 7 (307X7) 7 307 0.276  12.087 
315 × 7 (315X7) 7 315 0.276  12.402 
325 × 7 (325X7) 7 325 0.276  12.795 
335 × 7 (335X7) 7 335 0.276  13.189 
345 × 7 (345X7) 7 345 0.276  13.583 
355 × 7 (355X7) 7 355 0.276  13.976 
365 × 7 (365X7) 7 365 0.276  14.37 
375 × 7 (375X7) 7 375 0.276  14.764 
387 × 7 (387X7) 7 387 0.276  15.236 
400 × 7 (400X7) 7 400 0.276  15.748 
412 × 7 (412X7) 7 412 0.276  16.22 
425 × 7 (425X7) 7 425 0.276  16.732 
437 × 7 (437X7) 7 437 0.276  17.205 
450 × 7 (450X7) 7 450 0.276  17.717 
462 × 7 (462X7) 7 462 0.276  18.189 
475 × 7 (475X7) 7 475 0.276  18.701 
487 × 7 (487X7) 7 487 0.276  19.173 
500 × 7 (500X7) 7 500 0.276  19.685 
515 × 7 (515X7) 7 515 0.276  20.276 
530 × 7 (530X7) 7 530 0.276  20.866 
545 × 7 (545X7) 7 545 0.276  21.457 
560 × 7 (560X7) 7 560 0.276  22.047 
580 × 7 (580X7) 7 580 0.276  22.835 
600 × 7 (600X7) 7 600 0.276  23.622 
615 × 7 (615X7) 7 615 0.276  24.213 
630 × 7 (630X7) 7 630 0.276  24.803 
650 × 7 (650X7) 7 650 0.276  25.591 
670 × 7 (670X7) 7 670 0.276  26.378 

CONTACT  FORM

    

We believe in the quality of our products and service. Fill out the form on the right-hand side and we will contact you shortly. Or you can use our product request form here.

NewDealSeals B.V.

+31 (0) 226 362 233

info@newdealseals.com

Boezemschop 8, Breekland, 1724 BJ Oudkarspel, The Netherlands