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Maryland Metrics: Technical Data Chart
   
French standard R o-ring size listing
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When inquiring for a quotation; include the standard number.

Other sizes are also available but are not included in this listing. Please inquire.
French standard R standard number Cord diameter (thickness) Inner diameter Outer diameter
  W ID OD
R 0 1.9 2.4 6.2
R 1 1.9 2.6 6.4
R 2 1.9 3.4 7.2
R 3 1.9 4.2 8
R 4 1.9 4.9 8.7
R 5 1.9 5.7 9.5
R 5a 1.9 6.4 10.2
R 6 1.9 7.2 11
R 6a 1.9 8 11.8
R 7 1.9 8.9 12.7
R 8 2.7 8.9 14.3
R 9 2.7 10.5 15.9
R 10 2.7 12.1 17.5
R 11 2.7 13.6 19
R 12 2.7 15.1 20.5
R 13 2.7 16.9 22.3
R 14 2.7 18.4 23.8
R 15 3.6 18.3 25.5
R 16 3.6 19.8 27
R 17 3.6 21.3 28.5
R 18 3.6 23 30.2
R 19 3.6 24.6 31.8
R 20 3.6 26.2 33.4
R 21 3.6 27.8 35
R 22 3.6 29.3 36.5
R 23 3.6 30.8 38
R 24 3.6 32.5 39.7
R 25 3.6 34.1 41.3
R 26 3.6 35.6 42.8
R 27 3.6 37.3 44.5
R 28 5.33 37.47 48.13
R 29 5.33 40.65 51.31
R 30 5.33 43.82 54.48
R 31 5.33 47 57.66
R 32 5.33 50.16 60.82
R 33 5.33 53.34 64
R 34 5.33 56.52 67.18
R 36 5.33 62.87 73.53
R 37 5.33 66.04 76.7
R 38 5.33 69.22 79.88
R 39 5.33 72.4 83.06
R 40 5.33 75.57 86.23
R 41 5.33 78.74 89.4
R 42 5.33 81.92 92.58
R 43 5.33 85.09 95.75
R 44 5.33 88.27 98.93
R 45 5.33 91.44 102.1
R 46 5.33 94.62 105.28
R 47 5.33 97.8 108.46
R 48 5.33 100.97 111.63
R 49 5.33 104.14 114.8
R 50 5.33 107.32 117.98
R 51 5.33 110.49 121.15
R 52 5.33 113.67 124.33
R 53 6.99 113.67 127.65
R 54 6.99 116.84 130.82
R 55 6.99 120.02 134
R 56 6.99 123.2 137.18
R 57 6.99 126.37 140.35
R 58 6.99 129.54 143.52
R 59 6.99 132.72 146.7
R 60 6.99 135.9 149.88
R 61 6.99 139.07 153.05
R 62 6.99 142.24 156.22
R 63 6.99 145.42 159.4
R 65 6.99 151.77 165.75
R 66 6.99 158.12 172.1
R 67 6.99 164.47 178.45
R 68 6.99 170.82 184.8
R 69 6.99 177.17 191.15
R 70 6.99 183.52 197.5
R 71 6.99 189.87 203.85
R 72 6.99 196.22 210.2
R 73 6.99 202.57 216.55
R 74 6.99 215.27 229.25
R 75 6.99 227.97 241.95
R 76 6.99 240.67 254.65
R 77 6.99 253.37 267.35
R 78 6.99 266.07 280.05
R 79 6.99 278.77 292.75
R 80 6.99 291.47 305.45
R 81 6.99 304.17 318.15
R 82 6.99 316.87 330.85
R 83 6.99 329.57 343.55
R 84 6.99 342.27 356.25
R 85 6.99 354.97 368.95
R 86 6.99 367.67 381.65
R 87 6.99 380.37 394.35
R 88 6.99 393.07 407.05

(Unit: mm)

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