Mutual Screw & Supply

HNBR O-Rings | AS568-428 | Dash 428 | 80 Durometer (5 / Pkg.)

HNBR O-Rings | AS568-428 | Dash 428 | 80 Durometer (5 / Pkg.) - Main image
$39.35 $55.42 In stock

HNBR o-rings in AS568-428. 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: 428
  • Durometer: 80 Shore A
  • Temperature range: -40°F to +300°F (-40°C to +149°C)
  • Measurement type: Imperial
  • Pack quantity: 5 per package
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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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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 (4.8 / 5 · 5 reviews)

Richard ★★★★★

The 80 durometer feels just right for sealing our hydraulic cylinder—firm but not brittle. I’m glad I grabbed these for the high-temp limit of 300°F; they’ve held up perfectly through a few hot cycles.

Ryan ★★★★★

I needed a backup set for a -40°F application and these HNBR rings fit the bill perfectly. They seated nicely in the groove without any distortion, and the 80 durometer feels noticeably more durable than my old standard Buna-N ones.

Joseph L. ★★★★★

Bought a 5-pack for a high-temp hydraulic setup and the -40°F to +300°F spec gave me real peace of mind. The 80 durometer hardness feels substantial, not flimsy like some cheaper seals I've tried. Swapped them in yesterday and they seated perfectly without any tweaking.