M83248/1-030 – Textron Aviation OEM O-Ring
Available now on the Airparts.aero Marketplace.
Overview
The M83248/1-030 is a military-standard, preformed packing O-ring engineered for the most demanding high-temperature fluid sealing applications in aerospace. This component is manufactured in strict accordance with the MIL-DTL-83248 Type 1 specification, which mandates the use of a high-performance 90-durometer Fluorocarbon (FKM) elastomer, commonly known by the trade name Viton®. This O-ring is specifically designed to provide a reliable, long-lasting seal in systems exposed to synthetic turbine engine oils, hydraulic fluids, and hydrocarbon fuels at elevated temperatures. As a certified OEM component specified by Textron Aviation, it supersedes the older M25988/1 specification, offering enhanced performance.
Key Features
- High-Temperature Fluorocarbon (FKM) Material: Fabricated from a Viton® (FKM) elastomer with a 90-durometer hardness. This material provides exceptional resistance to chemical degradation and maintains its physical properties at continuous operating temperatures up to 400°F (204°C).
- Excellent Fluid & Chemical Resistance: Offers superior resistance to a wide array of aggressive fluids, including synthetic turbine oils (MIL-PRF-23699), petroleum-based oils, jet fuels, and both petroleum-based (MIL-H-5606) and synthetic (MIL-H-83282) hydraulic fluids.
- High-Durometer Hardness: The 90-durometer hardness provides excellent resistance to extrusion, making this O-ring ideal for high-pressure static sealing applications, often eliminating the need for a backup ring.
- Mil-Spec Certified Quality: As a certified military specification part, the M83248/1-030 guarantees full material traceability, dimensional accuracy, and performance characteristics that meet the highest standards for safety and airworthiness.
- Distinctive Color-Coding: The brown color of the O-ring is mandated by the M83248/1 specification, providing immediate visual confirmation that the correct, high-temperature, high-durometer FKM material is being used.
Technical Specifications
- Standard: MIL-DTL-83248 Type 1, Class 1 (supersedes M25988/1)
- Full Part Number: M83248/1-030
- Legacy Part Number: M25988/1-030
- Material: Fluorocarbon Rubber (FKM / Viton®)
- Durometer (Hardness): 90 Shore A
- Color: Brown
- AS568 Dash Size: -030
- Nominal Dimensions:
- Inside Diameter (I.D.): 1.489 inches
- Cross Section (C.S.): 0.070 inches
- Operating Temperature Range: Approximately -15°F to 400°F (-26°C to 204°C)
Aircraft Compatibility
The M83248/1-030 is a high-performance seal used across all categories of aviation, from high-performance piston aircraft to commercial and military jets, including many platforms from Textron Aviation (Cessna, Beechcraft). Its use is specified where high temperatures and aggressive fluids make standard Nitrile O-rings unsuitable.
- Common Applications:
- Turbine Engine Systems: Used as static seals in lubrication systems, fuel control units (FCUs), fuel pumps, and accessory gearboxes.
- High-Performance Piston Engines: Utilized in firewall forward applications near turbochargers and exhaust components.
- High-Pressure Hydraulic Systems: Serves as a primary seal in hydraulic pumps, valves, and actuators, especially in systems using synthetic, fire-resistant fluids.
Applications
The M83248/1-030 is the specified sealing solution for the most demanding static sealing challenges:
- High-Temperature, High-Pressure Sealing: Its primary application is in static joints that must maintain a leak-proof seal under high pressures and at elevated temperatures.
- Aggressive Fluid Containment: Provides a durable, long-term seal in constant contact with synthetic lubricants and hydraulic fluids that would cause other elastomers to swell, soften, or fail.
- Component Overhaul: A mandatory replacement item during the overhaul of any high-performance fuel, oil, or hydraulic component.
Why Choose M83248/1-030?
In high-temperature and high-pressure systems, an O-ring failure can lead to a critical fluid leak, creating a serious fire hazard and risking system failure. The M83248/1-030 is specifically engineered to thrive in these conditions. Its high-durometer FKM construction provides a robust defense against extrusion and chemical attack. Using a genuine, certified Mil-Spec part is the only way to ensure the O-ring has the correct material properties to perform reliably, ensuring the safety and airworthiness of the aircraft.
Order Your M83248/1-030 O-Rings Now
Ensure the integrity of your high-performance fluid systems with certified, military-specification seals. Visit Airparts.aero to order your M83248/1-030 O-rings today.
The MIL-DTL-83248 specification for O-rings represents a significant step up in performance from standard Nitrile seals. The Fluorocarbon (FKM) polymer's molecular structure, characterized by strong carbon-fluorine bonds, provides exceptional thermal stability and chemical inertness. The high 90-durometer hardness of the M83248/1-030 significantly increases its resistance to "extrusion," a failure mode where high pressure forces the O-ring material into the small clearance gap between two mating surfaces. This makes it particularly suitable for static face seals in high-pressure systems, as it can often maintain a seal without the need for a separate, hard plastic or metal "backup ring," simplifying design and assembly.
Note: This is a flight-critical sealing component. Always verify the correct O-ring part number from the applicable component maintenance manual (CMM) or aircraft Illustrated Parts Catalog (IPC). Ensure the O-ring is within its specified shelf life before installation. Lubricate with a clean, compatible system fluid to prevent damage during assembly. The brown color is a critical material identifier and should not be substituted.
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