Buna-N Backup Rings (Dash 278)

Buna-N Backup Rings (Dash 278)

These Buna-N Backup Rings have a contoured profile which cushions the O-Ring while protecting it from high pressure that could lead to seal failure. They are hard and withstand oils, water, and mild chemicals and provide an economical alternative to PTFE. backup rings.

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ZBIGHB90278
This item requires 1-2 weeks to prepare for shipment.

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Details

  • ASTM 568 Dash Size: 278
  • Color: Black
  • Cross Section (in): 0.139
  • Cross Section (mm): 3.53
  • Durometer: 90A
  • Grade: Standard
  • Hardness: Hard
  • ID (in): 11.984
  • ID (mm): 304.39
  • Inch/Metric: Inch
  • Material: Buna-N
  • Outter Diameter (In): 12.262
  • Outter Diameter (mm): 311.45
  • Profile: Round
  • Temp Range: -40 to 250 (F)
  • ZBIGHB90278

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