Mutual Screw & Supply

0.139" CS X 5.984" ID HNBR O-Rings | AS568-258 | Dash 258 | 80 Durometer (12 / Pkg.)

0.139" CS X 5.984" ID HNBR O-Rings | AS568-258 | Dash 258 | 80 Durometer (12 / - Main image
$41.94 $58.25 In stock

HNBR o-rings in AS568-258, 5.984" inner diameter by 0.139" cross-section. Service range -40°F to +300°F (-40°C to +149°C). Also known as HSN, Highly Saturated Nitrile.

Specifications

  • Product type: O-Ring
  • Material: HNBR
  • AS568 dash size: 258
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 5.984" (151.99 mm)
  • Durometer: 80 Shore A
  • Temperature range: -40°F to +300°F (-40°C to +149°C)
  • Measurement type: Imperial
  • Pack quantity: 12 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)

Henry O. ★★★★★

Finally got these to replace some worn-out seals on a hot oil line, and the -40 to 300°F range is perfect for the application. The 80 durometer feels noticeably firmer than the old ones, and they seated perfectly without any distortion.

Lily ★★★★★

I needed a reliable seal for a high-temp hydraulic line, and these o-rings handled 280°F with no signs of hardening after a full week. The 5.984" ID fit perfectly onto the groove without any stretching issues.

Penelope P. ★★★★★

The 80 durometer HNBR feels much tougher than the standard Buna-N I've used before, and it seals perfectly on my hot oil circulation pump. These fit the groove exactly with no stretching, ready for some serious heat cycles.