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Maryland Metrics: Technical Data Chart
   
JIS KS standard o-ring size listing
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KS standard number Cord diameter (thickness) Inner diameter Outer diameter
  W ID OD
KS-1 1.70±0.08 2.75±0.13 6.15
KS-2 1.70±0.08 3.75±0.13 7.15
KS-3 1.70±0.08 4.75±0.13 8.15
KS-4 1.70±0.08 5.75±0.13 9.15
KS-5 1.70±0.08 6.75±0.13 10.15
KS-6 1.70±0.08 7.75±0.13 11.15
KS-7 1.70±0.08 8.75±0.13 12.15
KS-8 1.70±0.08 9.75±0.13 13.15
KS-9 2.25±0.08 9.70±0.13 14.2
KS-10 2.25±0.08 11.70±0.13 16.2
KS-11 2.25±0.08 13.70±0.13 18.2
KS-12 2.25±0.08 15.70±0.13 20.2
KS-13 2.25±0.08 17.70±0.13 22.2
KS-14 2.25±0.08 19.70±0.13 24.2
KS-15 3.30±0.10 19.60±0.15 26.2
KS-16 3.30±0.10 21.60±0.15 28.2
KS-17 3.30±0.10 23.60±0.15 30.2
KS-18 3.30±0.10 24.60±0.15 31.2
KS-19 3.30±0.10 25.60±0.15 32.2
KS-20 3.30±0.10 27.60±0.15 34.2
KS-21 3.30±0.10 29.60±0.15 36.2
KS-22 3.30±0.10 31.60±0.15 38.2
KS-23 3.30±0.10 33.60±0.15 40.2
KS-24 3.30±0.10 35.60±0.15 42.2
KS-25 3.30±0.10 37.60±0.15 44.2
KS-26 3.30±0.10 39.60±0.15 46.2
KS-27 3.30±0.10 41.60±0.15 48.2
KS-28 3.30±0.10 43.60±0.15 50.2
KS-29 3.30±0.10 45.60±0.15 52.2
KS-30 3.30±0.10 47.60±0.15 54.2
KS-31 3.30±0.10 49.60±0.15 56.2
KS-32 5.60±0.13 49.40±0.25 60.6
KS-33 5.60±0.13 54.40±0.25 65.6
KS-34 5.60±0.13 59.40±0.25 70.6
KS-35 5.60±0.13 64.40±0.25 75.6
KS-36 5.60±0.13 69.40±0.38 80.6
KS-37 5.60±0.13 74.40±0.38 85.6
KS-38 5.60±0.13 79.40±0.38 90.6
KS-39 5.60±0.13 84.40±0.38 95.6
KS-40 5.60±0.13 89.40±0.38 100.6
KS-41 5.60±0.15 94.40±0.38 105.6
KS-42 5.60±0.15 99.40±0.38 110.6
KS-43 5.60±0.15 104.40±0.38 115.6
KS-44 5.60±0.15 109.40±0.38 120.6
KS-45 5.60±0.15 114.40±0.38 125.6
KS-46 5.60±0.15 119.40±0.38 130.6
KS-47 5.60±0.15 124.40±0.38 135.6
KS-48 5.60±0.15 129.40±0.58 140.6
KS-49 5.60±0.15 134.40±0.58 145.6
KS-50 5.60±0.15 139.40±0.58 150.6
KS-51 5.60±0.15 144.40±0.58 155.6
KS-52 5.60±0.15 149.40±0.58 160.6
KS-53 8.30±0.15 149.00±0.58 165.6
KS-54 8.30±0.15 159.00±0.58 175.6
KS-55 8.30±0.15 169.00±0.58 185.6
KS-56 8.30±0.15 179.00±0.58 195.6
KS-57 8.30±0.15 189.00±0.76 205.6
KS-58 8.30±0.15 199.00±0.76 215.6

(Unit: mm)

KS standard (KS / KS series) This is the O-ring size chart. For inner diameter, outer diameter, basic tolerance. The KS standard is a size series prescribed by leading manufacturers of hydraulic and pneumatic packing in the Showa era**, and today it is used for a wide range of equipment for exercise and cylindrical surface fixation.

**The Showa period, potentially "period of enlightened peace/harmony" or "period of radiant Japan"), or Showa era refers to the period of Japanese history corresponding to the reign of the Showa Emperor, Hirohito, from December 25, 1926, through January 7, 1989.


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