Mutual Screw & Supply

0.21" CS X 4.35" ID Buna-N Nitrile O-Rings | AS568-348 | Dash 348 | 70 Durometer | Black (50 / Pkg.)

0.21" CS X 4.35" ID Buna-N Nitrile O-Rings | AS568-348 | Dash 348 | 70 - Main image
$37.56 $52.16 In stock

Buna-N Nitrile o-rings in AS568-348, 4.35" 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: 348
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 4.35" (110.49 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)

Ella C. ★★★★★

I needed a replacement for a hydraulic cylinder seal and these o-rings fit the AS568-348 spec exactly. The 70 durometer rubber feels sturdy but pliable enough to seat properly in the groove. Great value for a 50-pack.

Ellie ★★★★★

Popped one of these on a 4" flange that kept leaking under pressure, and it sealed up tight. The 70-durometer hardness feels right for general hydraulic use. For the price of a 50-pack, I've got spares for the next few rebuilds.

Joseph ★★★★★

These fit perfectly on my old hydraulic cylinders and the -40°F rating gives me peace of mind for winter storage. I've torqued them down hard and they haven't squished out of shape one bit.