Mutual Screw & Supply

0.139" CS X 5.234" ID Buna-N Nitrile O-Rings | AS568-252 | Dash 252 | 70 Durometer | Black (80 / Pkg.)

0.139" CS X 5.234" ID Buna-N Nitrile O-Rings | AS568-252 | Dash 252 | 70 - Main image
$38.57 $51.42 In stock

Buna-N Nitrile o-rings in AS568-252, 5.234" inner diameter by 0.139" 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: 252
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 5.234" (132.94 mm)
  • Durometer: 70 Shore A
  • Color: Black
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 80 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 (4.4 / 5 · 5 reviews)

Mia ★★★★★

I needed o-rings that could handle a hot fluid system, and these hit the 250°F max without any issues. The 70 durometer feels pliable but firm enough for a good seal.

William M. ★★★★★

The heat range on these is what sold me, -40 to 250 covers everything I’ve got in the shop. The 5.234” inner diameter matches the groove perfectly, and the 70 durometer feels firm but not brittle.

Benjamin C. ★★★★★

Finally, an o-ring that actually fits the groove without me wrestling it for ten minutes—the 5.234" ID is spot-on. These 70 durometer rings feel properly firm and should handle the hydraulic temps I’m pushing them through.