NAS1611-020 - Preformed Aerospace Packing O-Ring

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2.72

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NAS1611-020 - Preformed Aerospace Packing O-Ring

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NAS1611‑020 – Preformed Packing O-Ring (0.858–0.870″ I.D. × 0.067–0.073″ W)

Available now on Airparts.aero Marketplace

Overview

The NAS1611‑020 preformed packing O‑Ring is a factory-approved seal used across a wide range of aerospace hydraulic, fuel, and pneumatic systems. Made from ethylene-propylene rubber (EPDM), it features phosphate-ester resistance and operates reliably from –65 °F to +250 °F, making it suitable for critical components like actuators, servo valves, and hydraulic glands.

Technical Specifications

  • Part Number: NAS1611‑020
  • Material: Ethylene-Propylene (EPDM); phosphate ester resistant
  • Inner Diameter (I.D.): 0.858″ minimum · 0.870″ maximum
  • Outer Diameter (O.D.): 0.989″ minimum · 1.019″ maximum
  • Cross-Section (Width): 0.067″ minimum · 0.073″ maximum
  • Operating Temperature: –65 °F to +250 °F (short-term up to 300 °F)
  • Finish: Black, heat-stable elastomer
  • Packaging: Individual or bulk (25-pack) supply available
  • Certification: MIL-SPEC / NAS scale; FAA traceable for airworthiness

Aircraft & System Compatibility

Used in critical aircraft platforms:

  • Beechcraft King Air, Cessna Citation, Bombardier Challenger, Embraer ERJ series
  • Applicable for hydraulic servo valves, fuel actuator glands, landing gear actuators, and environmental control systems
  • Installed per Illustrated Parts Catalog (IPC) guidance

Applications & Benefits

  • Preformed design ensures uniform gland sealing (“O-ring conforming to groove”)
  • Phosphate-ester oil resistance protects against degradation in Skydrol and synthetic hydraulic fluids
  • Expanded temp range and material durability reduce replacement frequency
  • Pre-installed O-ring simplifies maintenance during overhauls or AMM compliance checks

Maintenance & Installation Tips

  • Installation Method: Ensure correct gland dimension; verify sealing surface cleanliness
  • Replacement Guidelines: Required at hydraulic system overhaul, 500–750-hour intervals, or evidence of wear
  • Lubrication: Use compatible aerospace sealants per P/N maintenance documentation

Order the NAS1611‑020 O-Ring Today

Secure your hydraulic and fuel system performance with the NAS1611‑020 preformed seal—precision-molded, FAA-traceable, and ready to install. Get yours now from Airparts.aero, with fast shipping and expert technical support.