Mutual Screw & Supply

0.21" CS X 0.537" ID Viton FKM O-Rings | AS568-311 | Dash 311 | 75 Durometer | Brown (60 / Pkg.)

0.21" CS X 0.537" ID Viton FKM O-Rings | AS568-311 | Dash 311 | 75 Durometer | - Main image
$33.96 $52.24 In stock

Viton FKM o-rings in AS568-311, 0.537" inner diameter by 0.21" cross-section. Service range -15°F to +400°F (-26°C to +204°C). Also known as FKM, Fluoroelastomer.

Specifications

  • Product type: O-Ring
  • Material: Viton FKM
  • AS568 dash size: 311
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 0.537" (13.64 mm)
  • Durometer: 75 Shore A
  • Color: Brown
  • Temperature range: -15°F to +400°F (-26°C to +204°C)
  • Measurement type: Imperial
  • Pack quantity: 60 per package
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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.6 / 5 · 5 reviews)

Charlotte O. ★★★★★

I needed a high-temp seal for my hydraulic system, and these Viton rings handle the heat without any issue. The 75 durometer feels sturdy but not overly rigid during installation. Exactly what I needed for a leak-free fit.

Emily W. ★★★★★

Needed a seal that could handle serious heat, and these Viton rings are rated up to 400°F which is exactly what my setup demanded. The 75 durometer hardness feels firm but not brittle, and the brown color makes them easy to spot during disassembly. Sixty in a pack means I’ve got spares for the next

Claire G. ★★★★★

The 0.537" inner diameter fit perfectly on my compressor intake, and the -15°F to +400°F range gives me peace of mind for hot air applications. These Viton FKM o-rings feel much more durable than the standard Buna-N ones I've used before, and the 75 durometer is noticeably stiffer without being brit