50-105011 - Textron Aviation OEM Front Spar Bolt Washer Spacer

50-105011 – Textron Aviation OEM Front Spar Bolt Washer Spacer

Available now on the Airparts.aero Marketplace.

Overview

The Textron Aviation 50-105011 is a genuine OEM, flight-critical washer spacer, engineered for use in the front wing spar attachment assembly of the Beechcraft King Air series of aircraft. This is not a standard washer; it is a precision-machined structural component designed to be part of one of the most highly loaded joints in the entire airframe. Fabricated from ultra-high-strength steel alloy, its purpose is to provide a perfect bearing surface and maintain precise spacing for the main spar attachment bolts, ensuring that flight loads are distributed evenly and safely from the wing into the fuselage structure.

Key Features

• Flight-Critical Structural Component: Specifically designed for the wing-to-fuselage front spar attachment point, a primary structural joint that carries the immense lift, G-force, and torque loads experienced during flight.
• Ultra-High-Strength Steel Alloy: Manufactured from a specific, high-tensile strength steel alloy and heat-treated to achieve the immense compressive strength required to resist deformation under the high clamp loads of the spar bolts.
• Precision-Ground Surfaces & Thickness: Both the bearing surfaces and the overall thickness of the spacer are precision-ground to exceptionally tight tolerances. This is critical for preventing stress concentrations and ensuring a uniform transfer of loads between the bolt, the spar, and the fuselage fitting.
• Superior Corrosion Protection: Coated with a robust, multi-layer corrosion-resistant finish (typically cadmium or a zinc-nickel alloy) to protect the high-strength steel from environmental degradation, ensuring the long-term integrity of the wing attach point.
• Genuine Textron OEM Part: As a genuine factory component, it guarantees conformance to the exact material specifications, heat treatment, and dimensional tolerances of the original aircraft Type Certificate. For a component this critical, there is no substitute.

Technical Specifications

• Part Number: 50-105011
• Component Type: Structural Washer Spacer
• Primary Application: Front Wing Spar Bolt Assembly
• Material: Ultra-High-Strength, Heat-Treated Steel Alloy
• Finish: High-Performance Corrosion-Resistant Plating
• Dimensions: Proprietary to Textron Aviation. Thickness, ID, and OD are precisely controlled to OEM specifications.
• Certification: FAA Production Approval with full material and process traceability.

Aircraft Compatibility

The 50-105011 is the specified OEM washer spacer for the front spar attachment on some of the world's most successful turboprop aircraft.

• Primary Aircraft Models:
  • Beechcraft King Air: 90, C90, E90 Series
  • Beechcraft King Air: 100, A100, B100 Series
  • Beechcraft Super King Air: 200, B200 Series

Applications

The 50-105011 has a singular, profoundly important application:

• Wing Spar Attachment: Serves as the critical interface between the main wing spar attachment bolt and the airframe structure. It distributes the immense clamping force of the torqued bolt and ensures the joint is free from any play or movement.
• Mandatory Inspection & Replacement: This component must be meticulously inspected for any signs of cracking, corrosion, or deformation any time the wing bolts are removed for scheduled inspection or maintenance. It is often a mandatory replacement item.

Why Choose 50-105011?

The joint connecting the wing to the fuselage is arguably the most critical structural connection on any aircraft. Its integrity is absolute and non-negotiable. The 50-105011 washer spacer is an engineered part of this system. Using a genuine Textron Aviation OEM part is the only way to ensure the component has the certified material strength and precise dimensions to handle the calculated flight loads. The use of any non-approved hardware in this location would be a gross violation of safety and airworthiness standards.

Order Your 50-105011 Front Spar Washer Spacers Now

Ensure the structural integrity of your aircraft with genuine, factory-certified, flight-critical hardware. Visit Airparts.aero to order your Textron Aviation 50-105011 washer spacers today.

The 50-105011 washer spacer is a key element in a high-clamp, friction-type structural joint. When the massive spar bolts are torqued to their specified, extremely high value, they stretch elastically, creating an immense clamping force that presses the wing spar fitting and the fuselage fitting together. The primary mechanism that transfers flight loads is the friction generated between these clamped surfaces. The 50-105011 washer's role is to provide a perfectly flat, parallel, and incompressible bearing surface under the bolt head and nut, ensuring this clamping force is distributed evenly across the joint. Any deformation or "cupping" of the washer would lead to a loss of bolt preload, compromising the frictional capacity of the joint and allowing micro-movements that could lead to catastrophic fatigue failure.

Note: This is a flight-critical structural component. It must only be used in the application specified by the Textron Aviation maintenance and structural repair manuals. Installation must be performed by a certified A&P mechanic with experience in heavy structural aircraft maintenance. All procedures, including fastener lubrication and torque application, must be followed with absolute precision.

Applicable Textron Aircraft

• Baron Series B55, E55, 58 or G58
• Bonanza 36
• King Air 100
• King Air C90, C90A, C90GT or E90

List not comprehensive, may be applicable on other models.