Mutual Screw & Supply

0.21" CS X 6.975" ID Buna-N Nitrile O-Rings | AS568-359 | Dash 359 | 70 Durometer | Black (50 / Pkg.)

0.21" CS X 6.975" ID Buna-N Nitrile O-Rings | AS568-359 | Dash 359 | 70 - Main image
$41.61 $59.44 In stock

Buna-N Nitrile o-rings in AS568-359, 6.975" 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: 359
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 6.975" (177.16 mm)
  • Durometer: 70 Shore A
  • Color: Black
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 50 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 (5.0 / 5 · 5 reviews)

Lily ★★★★★

The 0.21" cross-section on these o-rings fits perfectly into my pump’s retaining groove, and the 70 durometer feels just right for the application. I’ve used them in cold storage areas down to freezing temps without any cracking. Solid performance for the price.

Amelia ★★★★★

Replacing the seals on my hydraulic press was way less painful than I expected, and these 6.975" ID rings slipped right into the groove without any wrestling. The 70 durometer feels firm but not brittle, and they've held up fine after a few hours at 180°F so far.

Daniel L. ★★★★★

These fit perfectly on my air cylinder rebuild, and the 70 durometer hardness feels just right for the seal. The -40°F to +250°F range gives me confidence they'll hold up in my unheated shop through winter.