Mutual Screw & Supply

0.07" CS X 3.239" ID Buna-N Nitrile O-Rings | AS568-042 | Dash 042 | 70 Durometer | Black (300 / Pkg.)

0.07" CS X 3.239" ID Buna-N Nitrile O-Rings | AS568-042 | Dash 042 | 70 - Main image
$36.68 $50.24 In stock

Buna-N Nitrile o-rings in AS568-042, 3.239" inner diameter by 0.07" 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: 042
  • Cross-section: 0.07" (1.78 mm)
  • Inner diameter: 3.239" (82.27 mm)
  • Durometer: 70 Shore A
  • Color: Black
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 300 per package
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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.6 / 5 · 5 reviews)

Jason M. ★★★★★

I needed some 3.239" ID o-rings for a hydraulic repair, and the 70 durometer Buna-N feels both pliable and sturdy. These fit perfectly and held up fine at around 180°F so far. The 300-count pack is way more than I needed, but nice to have spares.

Thomas ★★★★★

The box of 300 arrived and I've already used a dozen to replace worn seals in my hydraulic lines. The 70 durometer hardness has a nice firm feel, and they slipped right into the grooves without any cutting or forcing. Good to have extras on hand at this price.

Adam T. ★★★★★

Finally found a 3.239" ID o-ring that doesn't stretch too thin on the groove. The 70 durometer feels right for a low-pressure water line I'm rebuilding.