Mutual Screw & Supply

Buna-N Nitrile O-Rings | AS568-445 | Dash 445 | 70 Durometer | Black (18 / Pkg.)

Buna-N Nitrile O-Rings | AS568-445 | Dash 445 | 70 Durometer | Black (18 / Pkg.) - Main image
$37.57 $50.09 In stock

Buna-N Nitrile o-rings in AS568-445. 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: 445
  • Durometer: 70 Shore A
  • Color: Black
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 18 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)

John ★★★★★

The 70 durometer material felt exactly right for sealing a fuel line fitting on my old tractor. These 445-sized rings seated perfectly with no squishing out. Great price for a pack of 18.

Madison U. ★★★★★

I needed these for a hydraulic repair on an old log splitter and the 70 durometer hardness was just right for the application. I also appreciate that they’re rated for sub-zero temps, which is common in my shop during winter.

Ella G. ★★★★★

Buna-N holds up great at 250°F, and the 70 durometer is firm enough to keep these 445s seated without any squish. The pack of 18 came neatly organized, and the black finish made them easy to spot on the bench. I’ve already reordered a second set for spare parts.