HL86-6 - Textron Aviation OEM Hi-Lock Collar

HL86-6 – Textron Aviation OEM Hi-Lok Collar

Available now on the Airparts.aero Marketplace.

Overview

The HL86-6 is a genuine OEM, flight-critical Hi-Lok collar, a key component of the high-strength, two-piece Hi-Lok fastening system. This collar is engineered to be paired with a corresponding -6 (3/16") diameter Hi-Lok pin, creating a lightweight, vibration-resistant structural joint. The hallmark of this system is the collar's frangible hex wrenching element, which shears off at a predetermined torque value during installation, ensuring a precise and consistent preload is achieved every time. Manufactured from high-strength aluminum alloy, the HL86-6 is a modern fastening solution used in the primary airframe structures of Textron Aviation aircraft and throughout the aerospace industry.

Key Features

• 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 joint is clamped with the precise, engineered force.
• Lightweight Aluminum Construction: Fabricated from high-strength 2024-T851 aluminum alloy, providing an excellent strength-to-weight ratio. This makes it a preferred fastener for reducing the overall weight of the airframe compared to traditional steel nuts.
• Vibration Resistance: The Hi-Lok system creates a high-preload joint that is exceptionally resistant to loosening under the severe vibration and cyclical loads of flight, ensuring long-term structural integrity.
• Red Anodized Finish: Finished with a red anodize coating per MIL-A-8625. This finish provides corrosion resistance and serves as a visual identifier for the aluminum alloy material.
• 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.

Technical Specifications: HL86-6 - Textron Aviation OEM Hi-Lock Collar

• Part Number: HL86-6
• Component Type: Hi-Lok Frangible Hex Collar
• Material: 2024-T851 Aluminum Alloy
• Finish: Red Anodized
• Nominal Pin Diameter: For use with -6 (3/16 inch) Hi-Lok pins.
• Thread Specification: .1900-32 UNJF-3B
• Installation Tool Requirement: Hi-Lok installation tool with a hex key to hold the pin stationary while the collar is tightened.

(Note: Specifications are based on general Hi-Lok HL86 series standards for HL86-6. Always refer to your aircraft's specific maintenance manual and Textron Aviation's Illustrated Parts Catalog for definitive application details and precise torque values.)

Aircraft Compatibility

Hi-Lok fastening systems, including the HL86-6 collar, are used extensively in the assembly of modern aircraft where high strength and low weight are critical. They are found across the Textron Aviation product line.

• Common Aircraft Platforms:
  • Textron Aviation (Cessna & Beechcraft): Used in various models from high-performance pistons to business jets like the Citation series.
  • Universally used by other major airframe manufacturers like Boeing and Airbus.
• Common Applications:
  • Joining wing skins, spars, and ribs.
  • Assembling fuselage frames and bulkheads.
  • Attaching primary structural brackets and fittings.

Applicable Textron Aircraft

Click on aircraft model to view serial range in Shop by Model.

• 1900 Airliner
• 1900C Airliner
• 1900D Airliner
• Beechjet 400/400A
• Citation CJ1 or CJ1+
• Citation CJ2 or CJ2+
• Citation CJ3 or CJ3+
• Citation CJ4
• Citation III, VI or VII
• Citation Latitude
• Citation Longitude
• Citation M2
• Citation Mustang
• Citation Sovereign or Sovereign+
• Citation V, Ultra, Encore or Encore+
• Citation X
• Citation X+
• Citation XLS, XLS+ or XLS Gen2
• Premier Model 390
• SkyCourier

List not comprehensive, may be applicable on other models.

Applicable Bombardier Aircraft

Validate engineering for aircraft applicability.

• Challenger 600
• Challenger 601
• Challenger 601-3A/3R
• Challenger 604
• Challenger 605
• Challenger 650
• Learjet 23
• Learjet 24
• Learjet 25
• Learjet 28
• Learjet 29
• Learjet 31
• Learjet 35
• Learjet 36
• Learjet 55
• Learjet 60 / 60XR
• Various Non Bombardier Aircraft

Applications

The HL86-6 collar is the specified component for creating permanent, high-strength structural joints:

• Fatigue-Critical Structures: The consistent preload achieved with the Hi-Lok system is essential for maximizing the fatigue life of a structural joint.
• Lightweight Design: A key component used by engineers to reduce airframe weight without compromising structural strength.
• Automated & High-Volume Assembly: The controlled installation makes it ideal for modern aircraft manufacturing processes.

Why Choose HL86-6?

The strength and reliability of an aircraft's structure is dependent on the integrity of its fastened joints. The Hi-Lok system, featuring the HL86-6 collar, provides a scientifically controlled method for achieving the correct clamp load, which is the most critical factor in a joint's performance. Using a genuine, traceable HL86-6 ensures you are installing a component with the certified material strength and precise engineering required to guarantee a safe, airworthy, and long-lasting structural connection. There is no substitute for this level of controlled fastening technology.

Website Metadata

• Meta Title: HL86-6 Hi-Lok Collar, Aluminum, for 3/16" Pin | Textron OEM | Airparts.aero
• Meta Description: Purchase genuine HL86-6 Hi-Lok collars. This red anodized, 2024-T851 aluminum alloy collar is for 3/16" Hi-Lok pins and features a shear-off hex for automatic torque control.
• SEO and Plain Text Keywords: HL86-6, Hi-Lok collar, Hi-Lok fastener, aerospace fastener, structural fastener, frangible collar, Textron Aviation parts, aircraft hardware, shear collar, .1900-32 thread, Airparts.aero.

Order Your HL86-6 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 HL86-6 collars today.

SEO-Enhanced Addendum

The Hi-Lok fastening system, which includes the HL86-6 collar, is a direct evolution of the traditional nut and bolt. It combines the benefits of a bolt and a rivet into one system. During installation, a special tool with a concentric sleeve holds the collar while an internal hex key passes through it to engage and hold the Hi-Lok pin stationary. As the tool tightens the collar, it stretches the pin, creating a high-preload clamping force on the structural members. When the preload reaches the designed value, the torque required to continue tightening exceeds the shear strength of the collar's thin-walled hex driver. This hex shears off cleanly, providing a visual indication of a completed installation and leaving behind a compact, permanent, and perfectly torqued collar.

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