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The [DIN 3771" standard for O-rings is produced by the Duetsches Institut für Normung (German Institute for Standards). The [DIN 3771" specification describes 258 O-rings. Each size is designated by the ID × cross-section. Optionally, this designation may be followed by a letter indicating the quality level ([N" - normal quality; [S" - special quality. Subsequent to the letter indicating the quality level, the rubber polymer and IRHD hardness may be specified.
In contrast to the AS 568 A inch system, the nominal and physical dimensions of metric O-rings match precisely. That is, a 1 mm O-ring will have a cross-section of 1 mm. The space that is being filled must be about 10% to 15% smaller than the cross-section of the O-ring in order for O-ring to seal properly.
DIN 3771 Size Chart (part of information)
|
No |
Reference |
C/S (MM) |
I.D. (MM) |
C/S (Inch) |
I.D. (Inch) |
|
1 |
1.8 X 1.8 |
1.80 |
1.80 |
0.071 |
0.071 |
|
2 |
2 X 1.8 |
1.80 |
2.00 |
0.071 |
0.079 |
|
3 |
2.24 X 1.8 |
1.80 |
2.24 |
0.071 |
0.088 |
|
4 |
2.5 X 1.8 |
1.80 |
2.50 |
0.071 |
0.098 |
|
5 |
2.8 X 1.8 |
1.80 |
2.80 |
0.071 |
0.110 |
|
6 |
3.15 X 1.8 |
1.80 |
3.15 |
0.071 |
0.124 |
|
7 |
3.55 X 1.8 |
1.80 |
3.55 |
0.071 |
0.140 |
|
8 |
3.75 X 1.8 |
1.80 |
3.75 |
0.071 |
0.148 |
|
9 |
4 X 1.8 |
1.80 |
4.00 |
0.071 |
0.157 |
|
10 |
4.5 X 1.8 |
1.80 |
4.50 |
0.071 |
0.177 |
|
11 |
4.87 X 1.8 |
1.80 |
4.87 |
0.071 |
0.192 |
|
12 |
5 X 1.8 |
1.80 |
5.00 |
0.071 |
0.197 |
|
13 |
5.15 X 1.8 |
1.80 |
5.15 |
0.071 |
0.203 |
|
14 |
5.3 X 1.8 |
1.80 |
5.30 |
0.071 |
0.209 |
|
15 |
5.6 X 1.8 |
1.80 |
5.60 |
0.071 |
0.220 |
|
16 |
6 X 1.8 |
1.80 |
6.00 |
0.071 |
0.236 |
|
17 |
6.3 X 1.8 |
1.80 |
6.30 |
0.071 |
0.248 |
|
18 |
6.7 X 1.8 |
1.80 |
6.70 |
0.071 |
0.264 |
|
19 |
6.9 X 1.8 |
1.80 |
6.90 |
0.071 |
0.272 |
|
20 |
7.1 X 1.8 |
1.80 |
7.10 |
0.071 |
0.280 |
|
21 |
7.5 X 1.8 |
1.80 |
7.50 |
0.071 |
0.295 |
|
22 |
8 X 1.8 |
1.80 |
8.00 |
0.071 |
0.315 |
|
23 |
8.5 X 1.8 |
1.80 |
8.50 |
0.071 |
0.335 |
|
24 |
8.75 X 1.8 |
1.80 |
8.75 |
0.071 |
0.344 |
|
25 |
9 X 1.8 |
1.80 |
9.00 |
0.071 |
0.354 |
|
26 |
9.5 X 1.8 |
1.80 |
9.50 |
0.071 |
0.374 |
|
27 |
10 X 1.8 |
1.80 |
10.00 |
0.071 |
0.394 |
|
28 |
10.6 X 1.8 |
1.80 |
10.60 |
0.071 |
0.417 |
|
29 |
11.2 X 1.8 |
1.80 |
11.20 |
0.071 |
0.441 |
|
30 |
11.8 X 1.8 |
1.80 |
11.80 |
0.071 |
0.465 |
|
31 |
12.5 X 1.8 |
1.80 |
12.50 |
0.071 |
0.492 |
|
32 |
13.2 X 1.8 |
1.80 |
13.20 |
0.071 |
0.520 |
|
33 |
14 X 1.8 |
1.80 |
14.00 |
0.071 |
0.551 |
|
34 |
15 X 1.8 |
1.80 |
15.00 |
0.071 |
0.591 |
|
35 |
16 X 1.8 |
1.80 |
16.00 |
0.071 |
0.630 |
|
36 |
17 X 1.8 |
1.80 |
17.00 |
0.071 |
0.669 |
|
37 |
14 X 2.65 |
2.65 |
14.00 |
0.104 |
0.551 |
|
38 |
15 X 2.65 |
2.65 |
15.00 |
0.104 |
0.591 |
|
39 |
16 X 2.65 |
2.65 |
16.00 |
0.104 |
0.630 |
|
40 |
17 X 2.65 |
2.65 |
17.00 |
0.104 |
0.669 |
|
41 |
18 X 2.65 |
2.65 |
18.00 |
0.104 |
0.709 |
|
42 |
19 X 2.65 |
2.65 |
19.00 |
0.104 |
0.748 |
|
43 |
20 X 2.65 |
2.65 |
20.00 |
0.104 |
0.787 |
|
44 |
21.2 X 2.65 |
2.65 |
21.20 |
0.104 |
0.835 |
|
45 |
22.4 X 2.65 |
2.65 |
22.40 |
0.104 |
0.882 |
|
46 |
23.6 X 2.65 |
2.65 |
23.60 |
0.104 |
0.929 |
|
47 |
25 X 2.65 |
2.65 |
25.00 |
0.104 |
0.984 |
|
48 |
25.8 X 2.65 |
2.65 |
25.80 |
0.104 |
1.016 |
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Our technicists are senior engineer, doctor and postgraduate, also invite the professional designers from Japan and Germany. We constantly study ,update the product, and test the raw material, to achieve the best sealing performance, ensure the quality and usability of perfection.
Our business philosophy: "quality is life, service is soul, advanced service is feature, high efficiency is attraction, and the user's satisfaction as the ultimate pursuit."
We specialized in hydraulic sealing products, like O-Ring,X-Ring,Bonded Seal,Back-up Ring,O-Ring Cord,O-Ring Kit,Oil Seal,Rubber Gasket and etc.
Our company can provide you:
1. Standard(AS568,JIS2401,BS1516,DIN3771,ISO3601) and Non-standard sizes, customized size also available;
2. Materials: NBR, HNBR, FKM/Viton, MVQ/Silicon, EPDM, CR, etc.;
3. Certificates: SGS, RoHS, CE,FDA, ISO9001-2008;
4. Large stock: Stockable with 1.78mm,2.62mm,3.53mm,5.33mm,6.99mm;
5. Complete mould: CNC Center has ability to make moulds by us;
6. Free samples are available upon request;
7. Competitive price and stable quality;
Ningbo Jiaodian Sealing Industry Co., Ltd.
Manufacturer , Trade Company
Rubber O-ring , Oil Seal , Rubber X-ring , Rubber Gasket , Bonded Seal , O-ring Kits
N/A
1500000RMB
2008
Manufacturer , Trade Company
№202,Dingqiao Rd,Jiangshan Town,Yinzhou District
Above 20
5 -10 People
11 -20 People
yes
1,000-3,000 square meters
№202,Dingqiao Rd,Jiangshan Town,Yinzhou District,Ningbo,China
