Mutual Screw & Supply

0.21" CS X 9.225" ID Buna-N Nitrile O-Rings | AS568-368 | Dash 368 | 70 Durometer | Black (35 / Pkg.)

0.21" CS X 9.225" ID Buna-N Nitrile O-Rings | AS568-368 | Dash 368 | 70 - Main image
$39.37 $52.49 In stock

Buna-N Nitrile o-rings in AS568-368, 9.225" inner diameter by 0.21" cross-section. Service range -40°F to +250°F (-40°C to +121°C). Also known as NBR, Buna-N, Chemigum, Hycar, Perbunan.

Specifications

  • Product type: O-Ring
  • Material: Buna-N Nitrile
  • AS568 dash size: 368
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 9.225" (234.31 mm)
  • Durometer: 70 Shore A
  • Color: Black
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 35 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)

Ella X. ★★★★★

I was pleasantly surprised how snug these fit on my hydraulic cylinder rebuild — the 70 durometer feels just right for the pressure. They seated easily with no twisting, and the material seems resilient enough for the 200°F fluid temps I’m running.

Madison G. ★★★★★

I needed a precise fit for a pneumatic seal and the 9.225" inner diameter of these o-rings was spot on, handling the -40°F to +250°F range without any leaks. The 70 durometer rubber feels durable and has held up well in my application.

Miles H. ★★★★★

Used these to rebuild a hydraulic cylinder seal kit and the 9.225" ID was a dead-on match for my bore. The 70 durometer feels firm but pliable enough to seat without fighting, and they've held up fine at 180°F so far. Worth the price for a full pack of 35.