OSK™ Industrial Square Buna-N Square O-Ring Kit 18 Sizes 180 Pieces


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  • Model: K180X18SN70
  • -1 in Stock
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180 piece Square Ring Kit

AKA Square O-Rings - Lathe Cut Square Washer Rings

Square-rings are square cross-section seals designed to be interchangeable with standard AS568 O-Rings. Complete interchangeability within standard glands is assured in most applications.

Description - Buna-N Nitrile Rubber - NBR 70 Duro

On a cost basis, Buna-N, nitrile, or NBR, rubber is the least expensive of the oil resistant elastomers. As a result, nitrile is one of the most widely used rubber materials due to its combination of low cost, resistance to many chemicals, and good physical properties. The acrylonitrile content of this highly polar elastomer provides excellent oil and gas permeation resistance which increases as the level of ACN increases. Nitrile should not be exposed to direct sunlight or moderate to high levels of atmospheric ozone, as rapid deterioration will result. However, NBR will accept many antidegradants, most notably PVC, which offer some degree of improvement of these properties. Nitriles are usually sulfur cured, but peroxide curing is also possible, resulting in improved compression set.

Square O-Ring Kit Includes:

  • 10pc -008    0.176"ID X 0.308"OD X 0.066"CS    4.47mm ID X 7.83mm OD X 1.68mm CS
  • 10pc -009    0.208"ID X 0.34"OD X 0.066"CS    5.28mm ID X 8.64mm OD X 1.68mm CS
  • 12pc -010    0.239"ID X 0.371"OD X 0.066"CS    6.07mm ID X 9.43mm OD X 1.68mm CS
  • 12pc -011    0.301"ID X 0.433"OD X 0.066"CS    7.65mm ID X 11.01mm OD X 1.68mm CS
  • 12pc -012    0.364"ID X 0.496"OD X 0.066"CS    9.25mm ID X 12.61mm OD X 1.68mm CS
  • 10pc -013    0.426"ID X 0.558"OD X 0.066"CS    10.82mm ID X 14.18mm OD X 1.68mm CS
  • 10pc -014    0.489"ID X 0.621"OD X 0.066"CS    12.42mm ID X 15.78mm OD X 1.68mm CS
  • 10pc -015    0.551"ID X 0.683"OD X 0.066"CS    14mm ID X 17.36mm OD X 1.68mm CS
  • 10pc -110    0.362"ID X 0.56"OD X 0.099"CS    9.19mm ID X 14.21mm OD X 2.51mm CS
  • 10pc -111    0.424"ID X 0.622"OD X 0.099"CS    10.77mm ID X 15.79mm OD X 2.51mm CS
  • 10pc -112    0.487"ID X 0.685"OD X 0.099"CS    12.37mm ID X 17.39mm OD X 2.51mm CS
  • 10pc -113    0.549"ID X 0.747"OD X 0.099"CS    13.94mm ID X 18.96mm OD X 2.51mm CS
  • 10pc -114    0.612"ID X 0.81"OD X 0.099"CS    15.54mm ID X 20.56mm OD X 2.51mm CS
  • 10pc -115    0.674"ID X 0.872"OD X 0.099"CS    17.12mm ID X 22.14mm OD X 2.51mm CS
  • 10pc -116    0.737"ID X 0.935"OD X 0.099"CS    18.72mm ID X 23.74mm OD X 2.51mm CS
  • 10pc -117    0.799"ID X 0.997"OD X 0.099"CS    20.29mm ID X 25.32mm OD X 2.51mm CS
  • 7pc -211    0.796"ID X 1.064"OD X 0.134"CS    20.22mm ID X 27.02mm OD X 3.4mm CS
  • 7pc -212    0.859"ID X 1.127"OD X 0.134"CS    21.82mm ID X 28.62mm OD X 3.4mm CS

Operating Temperature: -40 to 212°F

*All manufacturer’s names, part numbers and descriptions are used for reference purposes only. O-Rings and Seal Kits are assembled with high quality, aftermarket parts.

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