Mutual Screw & Supply

0.139" CS X 1.421" ID Viton FKM O-Rings | AS568-221 | Dash 221 | X-Ring | 70 Durometer (25 / Pkg.)

0.139" CS X 1.421" ID Viton FKM O-Rings | AS568-221 | Dash 221 | X-Ring | 70 - Main image
$37.4 $51.23 In stock

Viton FKM o-rings in AS568-221, 1.421" inner diameter by 0.139" cross-section. Service range -15°F to +400°F (-26°C to +204°C). Also known as FKM, Fluoroelastomer.

Specifications

  • Product type: O-Ring (X-Ring)
  • Material: Viton FKM
  • AS568 dash size: 221
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 1.421" (36.09 mm)
  • Durometer: 70 Shore A
  • Temperature range: -15°F to +400°F (-26°C to +204°C)
  • Measurement type: Imperial
  • Pack quantity: 25 per package
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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 (4.8 / 5 · 5 reviews)

Aurora Z. ★★★★★

The 1.421" ID dimensions were spot-on for my assembly, so no wrestling or sloppy gaps. I’ve had these in a hot oil line that hits around 350°F and they’ve held their shape perfectly, no hardening or cracking after a month.

Sebastian O. ★★★★★

I’ve been using these o-rings for a high-temp pneumatic seal, and they haven't hardened or cracked after repeated cycles up to 350°F. The 70 durometer gives just the right squeeze without being too stiff.

Isabella X. ★★★★★

These fit perfectly on the pressure relief valve I'm rebuilding, and the 400°F rating gives me confidence they'll hold up. The 70 durometer feels just right—not too stiff, not too soft.