Mutual Screw & Supply

0.21" CS X 2.85" ID HNBR O-Rings | AS568-336 | Dash 336 | 90 Durometer (8 / Pkg.)

0.21" CS X 2.85" ID HNBR O-Rings | AS568-336 | Dash 336 | 90 Durometer (8 / - Main image
$31.91 $51.47 In stock

HNBR o-rings in AS568-336, 2.85" 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: 336
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 2.85" (72.39 mm)
  • Durometer: 90 Shore A
  • Temperature range: -40°F to +300°F (-40°C to +149°C)
  • Measurement type: Imperial
  • Pack quantity: 8 per package
Before you pay

Check the method and total at checkout.

When it ships

Allow for processing time as well as the journey to you.

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

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

View policy
If you need a refund

Keep your order number and contact the store to start.

Please contact us for the refund processing timeframe before returning an item.

View policy
Delivery costs

Review the cost for your destination and chosen service.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy
Returning an item

Check the return conditions before sending anything back.

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

View policy

Customer Reviews (4.6 / 5 · 5 reviews)

Owen O. ★★★★★

I needed a high-temp seal for a hydraulic fitting on a piece of equipment that runs near 250°F, and these HNBR rings are holding up perfectly without any visible wear. The fit on the groove is snug but not overly stiff, sealing the connection without any leaks. A solid choice for anyone dealing with

John ★★★★★

The 90 durometer HNBR compound feels noticeably stiffer than standard Buna, which is exactly what I needed for a high-heat application up to 300°F. Fit on the 2.85" bore was snug and leak-free on the first try, and the pack of eight gives me plenty of spares for the price.

Emily ★★★★★

After replacing the factory seals on my hydraulic press, these HNBR rings held up perfectly through several high-temp cycles without any deformation. The 90 durometer feels noticeably firmer than standard Buna-N, which is exactly what I needed for this application.