?unique=f531a19)
100-110-5611 – Textron Aviation OEM Packing O-Ring Seal
Part Number: 100-110-5611
Manufacturer: Textron Aviation (Hawker Beechcraft)
Common Synonyms: Gasket O-Ring, Shim O-Ring, Packing
Overview Section
The 100-110-5611 is a high-precision OEM Packing O-Ring specifically utilized in the airframe and environmental systems of the Hawker 800/900 series aircraft. Manufactured under the Hawker Beechcraft legacy brand (now Textron Aviation), this seal is designed to meet the rigorous performance standards of mid-sized business jets, where maintaining pressure integrity and fluid separation is safety-critical.
This O-ring follows the DTD560 (British Aerospace) material standard, which is typically a high-grade Nitrile (NBR) or Fluorocarbon compound optimized for low-temperature flexibility and resistance to aircraft fuels and lubricants. It is an essential component for pressurized fittings, valves, and manifold interfaces within the Hawker fleet.
Enhanced Technical Data
| Technical Metric | Specification Data |
| Material Specification | DTD560 GB QP (Aviation-Grade Elastomer) |
| Material Base | Nitrile (NBR) / Special Compound |
| Hardness (Durometer) | 70–80 Shore A (Standard for Aircraft Seals) |
| Dimensions (Nominal) | 0.5" (L) x 0.5" (W) x 0.15" (H) |
| Tensile Strength | ~1,500 to 2,000 PSI |
| Operating Temp Range | $-35°C$ to $+120°C$ ($-31°F$ to $+248°F$) |
| Maximum Shelf Life | 84 Months (7 Years) from Cure Date |
| Fluid Resistance | Engine Oil, Hydraulic Fluid (Mineral), Jet A/JP-8 Fuel |
Advanced Engineering & Application
The 100-110-5611 is engineered with a specific Cross-Sectional Squeeze ratio to function effectively in both static and limited dynamic applications. Under the DTD560 standard, the material undergoes "Hot Oil Aging" tests to ensure that the seal does not undergo excessive volumetric swell when exposed to hot engine lubricants or hydraulic fluids.
Engineering Insight: Compression Set Resistance
A critical design feature of this seal is its Compression Set Resistance. In aircraft environmental systems (such as the Hawker's air conditioning and bleed air valves), the seal must be able to "spring back" after being compressed for thousands of flight hours. Failure to do so leads to "cold-flow" leakage, where the seal remains flattened, allowing air or fluid to bypass the gland when system pressure is low.
Aircraft Compatibility
The 100-110-5611 is a high-utilization component within the Textron Aviation / Hawker fleet:
Hawker 800 Series: 800, 800A, 800B.
Hawker 800XP / 850XP: The most common application in the modern fleet.
Hawker 900XP: The final evolution of the 800-series airframe.
Beechcraft Surplus: Occasionally utilized in specialized assemblies of the King Air series where DTD-spec hardware is cross-referenced.
The Textron Aviation 100-110-5611 is a critical sealing solution for Hawker operators worldwide. When maintaining your Hawker 800XP or 900XP, utilizing OEM parts with verified DTD560 material traceability is essential for airworthiness and safety. This packing O-ring provides the necessary resistance to hydrocarbons and the low-temperature flexibility required for operations at the Flight Levels. By ensuring a precision fit within the system's gland design, the 100-110-5611 prevents costly unscheduled maintenance and hazardous fluid leaks.
Installation & Maintenance Addendum
Cure Date Verification: Always check the cure date on the individual sealed package. This part has a strict 84-month (7-year) limit.5 Beyond this date, the material may suffer from ozone cracking or loss of elasticity.
Lube Prior to Install: Use only MIL-PRF-5606 (if in a hydraulic system) or a thin film of clean engine oil to lubricate the O-ring. Do not use petroleum jelly, as it can degrade the DTD560 compound over time.
Visual Inspection: Before installation, "stretch" the O-ring slightly and inspect under a 10x glass for surface pits or mold-line flashes. Even a minor defect can cause a high-pressure weep.
