Mutual Screw & Supply

Buna-N Nitrile O-Rings | AS568-425 | Dash 425 | 70 Durometer | Black (40 / Pkg.)

Buna-N Nitrile O-Rings | AS568-425 | Dash 425 | 70 Durometer | Black (40 / Pkg.) - Main image
$38.79 $51.72 In stock

Buna-N Nitrile o-rings in AS568-425. 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: 425
  • Durometer: 70 Shore A
  • Color: Black
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 40 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 (4.2 / 5 · 5 reviews)

Lucy ★★★★★

The 70 durometer feels about right for my pneumatic valves—didn’t crush or split even when I torqued the fitting down tight. They’re holding up well in the 150°F air lines I’ve got them in, no leaks so far.

Lucy ★★★★★

These came in handy for my hydraulic line rebuild — the 70 durometer hardness feels just right, not too squishy. Fit the AS568-425 spec perfectly and the temperature range covers everything I need, so I’m set for the next few jobs.

Owen H. ★★★★★

I used these AS568-425 o-rings to rebuild an old hydraulic cylinder, and the 70-durometer Buna-N material was exactly what I needed for the temperature range. They fit perfectly on the first try with no binding or deformation. The 40-pack is great value for someone working through multiple repairs.