Mutual Screw & Supply

0.139" CS X 4.109" ID HNBR O-Rings | AS568-243 | Dash 243 | 80 Durometer (14 / Pkg.)

0.139" CS X 4.109" ID HNBR O-Rings | AS568-243 | Dash 243 | 80 Durometer (14 / - Main image
$31.97 $53.28 In stock

HNBR o-rings in AS568-243, 4.109" inner diameter by 0.139" cross-section. Service range -40°F to +300°F (-40°C to +149°C). Also known as HSN, Highly Saturated Nitrile.

Specifications

  • Product type: O-Ring
  • Material: HNBR
  • AS568 dash size: 243
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 4.109" (104.37 mm)
  • Durometer: 80 Shore A
  • Temperature range: -40°F to +300°F (-40°C to +149°C)
  • Measurement type: Imperial
  • Pack quantity: 14 per package
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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 (5.0 / 5 · 5 reviews)

Henry B. ★★★★★

The temperature range on these is exactly what my hydraulic setup needed, and the 80 durometer feels reassuringly solid when seated. Fit the groove perfectly on the first try, no wrestling required.

Aurora B. ★★★★★

I needed o-rings that could handle high heat, and these HNBR ones with the 300°F rating have been holding up great on my hydraulic press. The 0.139" cross-section feels solid and hasn't deformed after a month of daily use.

Zoe G. ★★★★★

The fit on my compressor was perfect right out of the package, and I love that these are rated to 300°F for my hot oil system. These 80 durometer rings feel noticeably sturdier than the standard ones I have used.