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Metric o-ring groove designs vary greatly and choosing the right one for your application is important for maximum o-ring performance. This metric o-ring groove design reference guide will help you find the right radius, back-up, pressure and other o-ring dimensions for basic applications. Once you find the exact metric o-ring you need, you can easily order online from the world's largest o-ring inventory network.

O-Ring Size Charts O-ring, x-ring and square ring size charts. U.S., Japanese JIS, British BS and Common Metric o-ring size charts.
O-Ring Compatibility O-ring compatibility information for thousands of different chemicals and materials.
O-Ring Material Properties Compare the o-ring material properties of FFKM, Viton, Buna-N, Aflas and more.

O-Ring Gland Dimensions

C/S
d2
(mm)		 Pressure No Back-Up
100 Bar max		 One Back-Up
> 100 Bar		 Two Back-Up
> 100 Bar alternating		 Radius
Stat Dynam. Pneum P
(mm)		 L
(mm)		 P
(mm)		 L1
(mm)		 P
(mm)		 L2
(mm)		 r1
(mm)
1.00 X     0.70 1.40 - - - - 0.20
1.50 X     1.14 2.40 - - - - 0.30
1.60 X     1.21 2.40   - .   0.30
1.78-1.80 X X   1.49 2.50 1.50 4.16 1.50 6.16 0.40
1.78-1.80     X 1.58 2.50 - - - - 0.40
1.90 X     1.40 2.60 - - - - 0.40
1.90   X   1.55 2.60 1.55 4.00 1.55 5.40 0.40
2.00 X X   1.68 2.80 1.70 4.20 1.70 5.60 0.40
2.40   X   1.80 3.30 2.05 4.70 2.05 6.10 0.50
2.40     X 2.16 3.30 - - - - 0.50
2.40 X     1.90 3.20 - - - - 0.50
2.50   X   2.12 3.50 2.15 4.90 2.15 6.30 0.50
2.50 X   X 2.28 3.50 - - - - 0.50
2.62-2.65 X X   2.25 3.25 2.28 4.65 2.28 6.50 0.60
2.62-2.65     X 2.36 3.25 - - - - 0.60
2.70 X X   2.30 3.60 2.30 5.00 2.30 6.40 0.60
2.95 X X   2.20 3.90 2.50 5.30 2.50 5.30 0.60
3.00   X   2.58 4.10 2.60 5.50 2.60 6.90 0.60
3.00     X 2.72 4.10 - - - - 0.60
3.00 X     2.45 3.80 - - - - 0.60
3.10 X X   2.50 4.10 2.70 5.50 2.70 6.90 0.60
3.50 X X   2.65 4.60 3.05 6.00 3.05 7.40 0.60
3.53-3.55 X     2.70 4.80 3.10 6.20 3.10 7.60 0.80
3.53-3.55     X 3.21 4.40 - - - - 0.80
3.60 X X   2.80 4.80 3.15 6.20 3.15 7.60 0.80
4.00 X X   3.46 5.40 3.51 6.80 3.51 8.20 0.80
4.50 X X   3.50 5.80 4.00 7.50 4.00 9.20 0.80
5.00 X X   4.45 6.70 4.46 8.50 4.46 10.30 0.80
5.00     X 4.65 6.70 - - - - 0.80
5.30-5.33 X X   4.72 6.45 4.75 7.66 4.75 10.26 1.20
5.30-5.33     X 4.85 6.45 - - - - 1.20
5.70 X X   4.60 7.20 5.00 8.90 5.00 10.60 1.20
6.00 X X   5.06 7.60 5.12 9.40 5.12 11.20 1.20
6.00     X 5.30 7.40 - - - - 1.20
6.99-7.00 X X   6.05 8.75 6.10 10.12 6.10 13.55 1.50
6.99-7.00     X 6.22 8.75 - - - - 1.50
8.40   X   7.65 11.10 7.68 13.30 7.68 15.50 1.50
8.40     X 7.85 11.10 - - - - 1.50
8.40 X     7.35 9.10 - - - - 1.50