Mutual Screw & Supply

0.139" CS X 3.984" ID HNBR O-Rings | AS568-242 | Dash 242 | 80 Durometer (14 / Pkg.)

0.139" CS X 3.984" ID HNBR O-Rings | AS568-242 | Dash 242 | 80 Durometer (14 / - Main image
$32.95 $52.3 In stock

HNBR o-rings in AS568-242, 3.984" 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: 242
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 3.984" (101.19 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)

Aurora R. ★★★★★

The 3.984" inner diameter is exactly what I needed for a hydraulic cylinder rebuild and the fit was perfect. These HNBR o-rings feel denser than standard nitrile ones I've used before, so they should hold up well in higher temperatures.

Victoria G. ★★★★★

The 0.139" cross-section on these AS568-242 rings fits perfectly into the gland I pre-measured, and the 80 durometer feels reassuringly firm. They handled a 250°F steam line test for three days without a single leak.

Ella ★★★★★

I needed a high-temperature seal for an engine rebuild, and these HNBR rings fit the bill perfectly. The 80 durometer feels sturdy, and the -40°F to +300°F rating gives me confidence in extreme conditions. They seated easily during installation.