Mutual Screw & Supply

0.21" CS X 1.037" ID Buna-N Nitrile O-Rings | AS568-319 | Dash 319 | 90 Durometer (250 / Pkg.)

0.21" CS X 1.037" ID Buna-N Nitrile O-Rings | AS568-319 | Dash 319 | 90 - Main image
$31.7 $51.96 In stock

Buna-N Nitrile o-rings in AS568-319, 1.037" 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: 319
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 1.037" (26.34 mm)
  • Durometer: 90 Shore A
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 250 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)

Zoe G. ★★★★★

Exactly 0.21" cross-section, so these seated perfectly in my old pneumatic valve groove where cheaper o-rings always rolled out. For the price, getting 250 of these industrial-grade Buna-N seals feels like stealing.

Julian ★★★★★

Installed these on a hydraulic cylinder rebuild and the 90 durometer held up perfectly under 2000 psi. The fit was snug and the bag had exactly 250 rings with no debris.

Evelyn T. ★★★★★

The 90 durometer feels noticeably firmer than standard o-rings, which is exactly what my pneumatic system needed. These 319s seated perfectly in the groove and held pressure on the first try.