S9413-019 - Textron Aviation OEM Preformed Packing O-Ring

S9413-019 – Textron Aviation OEM Preformed Packing O-Ring

Available now on the Airparts.aero Marketplace.

Overview

The Textron Aviation S9413-019 is a genuine OEM, flight-critical preformed packing O-ring, engineered for sealing key components in the fuel systems of a vast range of Cessna aircraft. This is not a standard hardware O-ring; it is a precision-molded seal fabricated from a high-performance Fluorocarbon (FKM) elastomer. It is specifically designed to provide a positive, leak-proof seal for fuel caps, fuel selector valves, and fuel strainers, preventing fuel leaks while withstanding constant exposure to aviation fuels and environmental factors.

Key Features

• High-Temperature Fluorocarbon (FKM) Material: Fabricated from a Viton® (FKM) or equivalent fluorocarbon elastomer. This material provides exceptional resistance to chemical degradation and maintains its sealing integrity at the operating temperatures found in aircraft fuel systems.
• Superior Fuel Resistance: Specifically formulated for long-term, continuous exposure to 100LL Avgas and Jet Fuel. It is highly resistant to swelling, hardening, and permeation, ensuring a durable, long-lasting seal against volatile fluids.
• Prevents Fuel Leaks & Contamination: Creates a tight seal that prevents fuel from leaking or siphoning from fuel caps and prevents water, dust, and other contaminants from entering the fuel tanks.
• Precision Molded Dimensions: Manufactured to extremely tight tolerances for cross-sectional diameter and inside diameter. The -019 dash size ensures a perfect fit within the machined grooves of specified fuel system components.
• Genuine Textron OEM Part: As a genuine factory component, it guarantees the correct material compound, durometer (hardness), and shelf-life controls required for a safe, airworthy, and long-lasting installation in a critical fuel system.

Technical Specifications

• Part Number: S9413-019
• Component Type: Fuel System O-Ring Seal
• Material: High-Temperature, Fuel-Resistant Fluorocarbon Elastomer (FKM / Viton®)
• Primary Function: Provides a static seal on fuel system components like fuel caps and selector valves.
• AS568 Dash Size: -019
• Nominal Dimensions:
  • Inside Diameter (I.D.): 0.864 inches (13/16")
  • Cross Section (C.S.): 0.103 inches (3/32")
• Certification: FAA Production Approval

Aircraft Compatibility

The S9413-019 is a critical sealing component on a vast number of Cessna's most popular single and multi-engine aircraft. It is imperative to consult the specific aircraft's Illustrated Parts Catalog (IPC) for final verification.

• Common Aircraft Series:
  • Cessna 100 Series: 152, 172, 177, 180, 182, 185
  • Cessna 200 Series: 206, 207, 210
  • Cessna 300 Series: 310, 337, 340
  • Cessna 400 Series: 402, 414, 421

Applications

The S9413-019 is an essential component for fuel system integrity and maintenance:

• Fuel Cap Seal: The primary seal that prevents fuel from leaking from the filler cap and water from entering the tank.
• Fuel Selector Valve Seal: Used to seal the body or shaft of the fuel selector valve, preventing dangerous cabin fuel leaks.
• Fuel Strainer Seal: Provides the seal for the fuel strainer bowl, ensuring no leaks at the lowest point of the fuel system.
• Mandatory Replacement Item: Must be replaced whenever a fuel component is serviced to ensure a fresh, reliable seal.

Why Choose S9413-019?

A fuel leak, no matter how small, is a significant safety hazard. The S9413-019 O-ring is the genuine, factory-specified component designed to prevent leaks at some of the most common service points in the fuel system. Using a genuine Textron Aviation OEM part is the only way to ensure the seal is made from the correct FKM compound, capable of withstanding constant fuel exposure without deteriorating. Substituting with a non-certified O-ring made from the wrong material (like standard Nitrile) can lead to rapid failure and a dangerous fuel leak.

Order Your S9413-019 O-Rings Now

Ensure a leak-free, airworthy fuel system with a genuine Textron Aviation OEM seal. Visit Airparts.aero to order your S9413-019 O-rings today.

The S9413-019 O-ring's Fluorocarbon (FKM) material is essential for its application as a fuel seal. Aviation gasoline (100LL) is a complex mixture of hydrocarbons, including a significant percentage of aromatic compounds like Toluene and Xylene. These aromatics are aggressive solvents that cause standard Nitrile (Buna-N) rubber to swell, soften, and lose its physical properties, leading to leaks. The high fluorine content in the FKM polymer chain makes it exceptionally resistant to this chemical attack. It maintains its durometer (hardness) and compression set resistance even after prolonged immersion in fuel, ensuring a consistent and reliable sealing force for the life of the component.

Note: This is a single-use, flight-critical sealing component. It must be replaced whenever the component it seals is removed. Ensure all sealing surfaces are meticulously clean, dry, and free of nicks or scratches before installation. Lubricate the O-ring with clean engine oil or a compatible lubricant before assembly to prevent damage.