Mutual Screw & Supply

0.21" CS X 12.475" ID HNBR O-Rings | AS568-378 | Dash 378 | 80 Durometer (4 / Pkg.)

0.21" CS X 12.475" ID HNBR O-Rings | AS568-378 | Dash 378 | 80 Durometer (4 / - Main image
$39.56 $54.94 In stock

HNBR o-rings in AS568-378, 12.475" inner diameter by 0.21" 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: 378
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 12.475" (316.86 mm)
  • Durometer: 80 Shore A
  • Temperature range: -40°F to +300°F (-40°C to +149°C)
  • Measurement type: Imperial
  • Pack quantity: 4 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)

Ava ★★★★★

The 0.21" cross-section makes these feel sturdier than the thinner ones I've used before, and the 12.475" ID fit my flange perfectly with a little coaxing. I've got them in a hot oil application and they've held up great so far, no leaking or hardening.

Steven J. ★★★★★

The -40°F to +300°F range is exactly what I needed for my outdoor equipment that sees harsh winters, and the 80 durometer feels sturdier than the cheaper rings I've used before. Fit the groove snugly on the first try, no wrestling required.

Julian X. ★★★★★

These o-rings fit perfectly in my hydraulic cylinder; the 80 durometer feels nice and firm. Sealed the joint with no leaks after a full pressure test.