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.