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238 Quad Ring (X-Ring), 3-1/2ID x 3-3/4OD, 70 Duro, Round, Black

238 Quad Ring (X-Ring), 3-1/2ID x 3-3/4OD, 70 Duro, Round, Black

Item #: WBB1371951

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Minimum Quantity: 10

Price: $0.83

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Nitrile rubber, also known as NBR or Buna N, is one of the most commonly used sealing elastomers due to its resistance to petroleum-based fuels and lubricants and its relatively low price. Nitrile elastomers are copolymers of acrylonitrile and butadiene. There are a number of common variations of nitrile compounds.
  • Acrylonitrile Content: The acrylonitrile (ACN) content of the polymer chains can be varied from 18% to 50%. Lower ACN content gives better low-temperature properties but poorer fuels and polar lubricants. Higher ACN content gives poorer low-temperature properties but improved fuels and polar lubricants resistance. Standard NBRs typically have 34% ACN content.
  • Cure system: Sulfur-cured
  • Standard Nitriles are usually sulfur-cured. Sulfur-cured compounds offer better low-temperature properties but are more prone to hardening with high temperatures.
  • Peroxide-cured nitriles have better heat resistance and lower compression sets but are more expensive and more difficult to process.
Temperature Range:
  • Standard Low Temp: -40°C (-40°F)
  • Standard High Temp: 100°C (212°F)

  • BRAND Global O-Ring & Seal
  • MANUFACTURERS PART NUMBER QN70238
  • PACKAGE QUANTITY 10
  • MATERIAL Buna-N
  • COLOR FINISH Black
  • DASH SIZE 238
  • DUROMETER 70
  • ID (ACTUAL) 3.50"
  • ACTUAL INSIDE DIAMETER INCHES 3.484
  • ACTUAL INSIDE DIAMETER MILLIMETERS 88.49
  • OD (ACTUAL) 3.75"
  • ACTUAL OUTSIDE DIAMETER INCHES 3.762
  • ACTUAL CROSS SECTION MILLIMETERS 3.53
  • ACTUAL CROSS SECTION INCHES 0.139
  • CROSS SECTION (ACTUAL) 0.125"
  • TEMPERATURE RANGE -40°F to +212°F
  • CONSTRUCTION Buna-N Rubber
  • DESCRIPTION Nitrile Quad Rings
  • SHAPE Round
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238 Quad Ring (X-Ring), 3-1/2ID x 3-3/4OD, 70 Duro, Round, Black

238 Quad Ring (X-Ring), 3-1/2ID x 3-3/4OD, 70 Duro, Round, Black

Item #: WBB1371951

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