EB-144 - Textron Aviation OEM High Tensile Double Hex Aerospace Nut

EB-144 – Textron Aviation OEM High Tensile Double Hex Aerospace Nut

Available now on the Airparts.aero Marketplace.

Overview

The Textron Aviation EB-144 is a genuine OEM, flight-critical, high-tensile self-locking nut, engineered specifically for securing the engine mounts on the Beechcraft Baron and Bonanza series of aircraft. This is a proprietary, high-performance fastener, not a standard AN/MS nut. Its 12-point (double hexagon) design allows for the application of high torque in the often space-constrained areas around the engine mount structure. Fabricated from an ultra-high-strength steel alloy, the EB-144 is designed to provide and maintain the critical clamping force required to safely secure the engine to the airframe through all operational stresses.

Key Features

• 12-Point Double Hexagon Drive: The primary feature is a 12-point head design. This allows for a higher transmission of torque from the socket, reduces the risk of rounding the fastener's points, and provides more potential engagement angles for a wrench in tight quarters compared to a standard 6-point nut.
• All-Metal Self-Locking Design: Incorporates a prevailing torque locking feature created by deforming the upper threads of the nut into a slightly elliptical shape. This all-metal design provides a reliable locking action that is not susceptible to the temperature limitations of a non-metallic (nylon) insert, making it ideal for the high-temperature engine compartment.
• Ultra-High-Strength Steel Alloy: Manufactured from a specific, heat-treated steel alloy to achieve an exceptionally high tensile strength. This is necessary to withstand the high preload from torquing without thread stripping or fatigue failure.
• Corrosion-Resistant Plating: Coated with a robust cadmium plating or equivalent finish. This provides superior protection against corrosion, ensuring the fastener maintains its structural integrity throughout its service life.
• Genuine Textron OEM Part: As the genuine factory component, it guarantees conformance to the proprietary material, heat treatment, dimensional, and locking-torque specifications required by the aircraft's Type Certificate.

Technical Specifications

• Part Number: EB-144
• Component Type: High-Tensile, 12-Point, All-Metal, Self-Locking Nut
• Primary Application: Engine Mount Attachment
• Material: High-Tensile, Heat-Treated Steel Alloy
• Finish: Cadmium Plated
• Head Style: 12-Point Double Hexagon
• Thread Specification: 7/16-20 UNF-3B (Verify against IPC for specific application)
• Maximum Operating Temperature: Suitable for high-temperature firewall forward applications (typically >250°F).
• Certification: FAA Production Approval with full material and process traceability.

Aircraft Compatibility

The EB-144 is the specified OEM nut for the engine mounting system on some of the world's most popular high-performance piston aircraft.

• Primary Aircraft Models:
  • Beechcraft Baron: B55, E55, 58 or G58 Series
  • Beechcraft Bonanza: 36 Series

Applications

The EB-144 has a singular, flight-critical application:

• Engine Mount Fastening: Used in conjunction with the corresponding high-strength bolts to secure the elastomeric engine mounts to the engine mount frame and the frame to the aircraft firewall. This joint bears the entire static weight, dynamic G-loads, and torsional forces of the powerplant.
• Mandatory Inspection Item: This hardware must be inspected for condition and proper torque at specified intervals and is often a mandatory replacement item during engine removal or after a hard landing event, per the maintenance manual.

Why Choose EB-144?

The engine mount connection is one of the most critical structural joints on any aircraft. A failure here would be catastrophic. The Textron Aviation EB-144 is an engineered solution, not just a nut. Its performance is calculated based on specific load paths, preload requirements, and material properties. Using a genuine OEM part is the only way to guarantee you are installing a fastener that meets the certified design requirements for strength, fatigue life, and reliable locking performance.

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• Meta Title: EB-144 Textron Beechcraft Engine Mount Nut, 12-Point Self-Locking | OEM | Airparts.aero
• Meta Description: Purchase the genuine Textron Aviation EB-144, a flight-critical, high-tensile, 12-point self-locking nut for the engine mounts on Beechcraft Baron and Bonanza series aircraft.
• SEO and Plain Text Keywords: EB-144, Textron Aviation parts, Beechcraft parts, Baron parts, Bonanza parts, engine mount nut, 12-point nut, structural nut, self-locking nut, high-tensile nut, OEM Beechcraft parts, Airparts.aero.

Order Your EB-144 Engine Mount Nuts Now

Ensure the integrity of your aircraft's most critical structural joint with genuine, factory-certified hardware. Visit Airparts.aero to order your Textron Aviation EB-144 engine mount nuts today.

SEO-Enhanced Addendum

The 12-point "double hex" design of the EB-144 is a specific engineering choice for high-torque applications. The increased number of points (corners) allows the socket to engage the nut more closely and with more contact surface area, distributing the turning force more evenly. This significantly reduces the stress on each individual corner, making the nut highly resistant to being "rounded off" when the high torque values required for engine mount bolts are applied. The all-metal locking feature functions by creating a spring-like friction grip on the bolt threads as they pass through the deformed section of the nut. This creates a consistent prevailing torque that holds fast against vibration, but unlike a nylon insert, it is not degraded by the high radiant heat from the engine and exhaust system.

Note: This is a flight-critical structural component. It must only be used in the application specified by the Textron Aviation maintenance manual. Installation requires the use of a calibrated torque wrench and a 12-point socket. Adherence to all specified torque procedures and sequences is essential to achieve the proper preload on the engine mount bolts.