132529A6 - Textron Aviation OEM Hi-Lok Tension Collar

132529A6 – Textron Aviation OEM Hi-Lok Tension Collar

Available now on the Airparts.aero Marketplace.

Overview

The 132529A6 is a genuine OEM, flight-critical Hi-Lok tension collar, a key component of the high-strength, two-piece Hi-Lok fastening system. This collar is specifically engineered for use with a corresponding Hi-Lok pin in primary structural applications where the joint is subjected to significant tensile (pulling) loads. Unlike a standard shear collar, the 132529A6 features a larger diameter and bearing surface to better distribute high clamp loads. Manufactured from a high-strength alloy, it features a frangible hex that shears off at a predetermined torque, ensuring a precise and consistent preload is achieved on every installation.

Key Features

• Tension-Rated Design: Engineered with a larger bearing face and greater mass than a standard shear collar. This allows it to safely handle high tensile loads and transfer them effectively from the pin to the structure without deformation.
• Automatic Torque Control: The collar features an external hex portion designed to shear off when the correct installation preload is reached. This removes operator-to-operator variability and guarantees that every fastener in a critical joint is clamped with the precise, engineered force.
• High-Strength Material: Fabricated from a high-strength alloy appropriate for tension applications, ensuring it can withstand high clamp loads and resist stress corrosion cracking.
• Controlled Preload System: When installed with a matching Hi-Lok pin, the collar's frangible hex shears off at a predetermined torque. This ensures that a precise and consistent clamping force (preload) is achieved on the joint, which is critical for fatigue life, especially under tension.
• Industry Standard: As a standard part used and specified by Textron Aviation, it guarantees full traceability and conformance to the demanding quality and performance characteristics of the Hi-Lok system for primary structural applications.

Technical Specifications

• Part Number: 132529A6
• Component Type: Hi-Lok Tension Frangible Hex Collar
• Material: High-Strength Alloy (Specific material would be confirmed by certs)
• Finish: Typically Anodized or Plated for corrosion resistance and identification.
• Nominal Pin Diameter: To be used with a Hi-Lok pin of a corresponding diameter.
• Thread Specification: Standard UNJF-3B thread for the corresponding pin diameter.
• Installation Tool Requirement: Hi-Lok installation tool with a hex key to hold the pin stationary while the collar is tightened.

Aircraft Compatibility

Hi-Lok tension fastening systems, including collars like the 132529A6, are used extensively in the assembly of modern aircraft where high-strength, fatigue-resistant joints are critical. They are found across the Textron Aviation product line.

• Common Aircraft Platforms:
  • Textron Aviation (Cessna & Beechcraft): Citation series business jets, King Air series, and other high-performance platforms.
  • Universally used by other major airframe manufacturers like Boeing and Airbus.
• Common Applications:
  • Primary fuselage and wing splice joints.
  • Attaching engine pylons and wing-to-body fairings.
  • Securing critical fittings and brackets that are subjected to tensile loads.

Applications

The 132529A6 collar is the specified component for creating permanent, high-strength structural joints under tension:

• Fatigue-Critical Structures: The consistent, high preload achieved with the Hi-Lok system is essential for maximizing the fatigue life of a structural joint under tension.
• Replacement for Heavy Hardware: A key component used by engineers to replace heavier traditional nuts and bolts, reducing airframe weight without compromising structural strength.

Why Choose 132529A6?

The strength and reliability of an aircraft's structure is dependent on the integrity of its fastened joints. For joints under tension, the ability of the fastener to maintain a high clamp load is paramount. The Hi-Lok system with the 132529A6 tension collar provides a scientifically controlled method for achieving this clamp load. Using a genuine, traceable 132529A6 ensures you are installing a component with the certified material strength and precise engineering required to guarantee a safe and airworthy structural connection.

Order Your 132529A6 Hi-Lok Collars Now

Build and repair your aircraft structure with the precision and reliability of the Hi-Lok fastening system. Visit Airparts.aero to order your genuine 132529A6 tension collars today.

In aerospace structures, a joint can be designed to primarily handle shear loads (forces acting parallel to the surface) or tension loads (forces acting perpendicular to the surface, pulling the joint apart). While a standard shear collar is sufficient for shear applications, a tension application requires a tension-rated collar like the 132529A6. The tension collar's larger diameter and integral washer face provide a greater bearing area. This larger area is critical for distributing the high clamp load of the torqued collar onto the structure without exceeding the material's bearing strength, which could otherwise cause crushing or deformation of the skin, especially on softer aluminum or composite surfaces. This makes the tension collar essential for maintaining the integrity of the joint under significant pulling forces.

Note: This is a flight-critical structural component. It must only be used where specified, in conjunction with the corresponding Hi-Lok pin of the correct diameter and grip length. Installation requires specialized Hi-Lok tooling. The sheared-off hex portion of the collar is discarded. These collars are not reusable.