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NAS8602-2 – Bombardier Aerospace OEM Aerospace Bolt
Available now on the Airparts.aero Marketplace.
Overview
The NAS8602-2 is a National Aerospace Standard, high-strength, 12-point structural shear bolt, a flight-critical fastener engineered for the most demanding applications in modern airframes, including those manufactured by Bombardier. This is not a standard AN bolt; it is a high-performance component fabricated from premium alloy steel and heat-treated to achieve a tensile strength of 160-180 KSI. Specified for use in primary structural joints, the NAS8602-2's 12-point head allows for high-torque application, creating a secure, fatigue-resistant connection essential for the safety and integrity of high-performance jet aircraft.
Key Features
- High-Strength Alloy Steel: Manufactured from a premium, vacuum-melted alloy steel (such as H-11) and heat-treated to achieve a minimum tensile strength of 160,000 PSI. This provides the exceptional strength required for flight-critical structural applications.
- 12-Point Head Design: The 12-point (double hexagon) head allows for higher torque application with reduced risk of wrench slippage compared to a standard 6-point hex head. This is essential for achieving the correct, high preload required in critical structural joints.
- Optimized for Shear Loads: While strong in tension, this bolt is designed as a "shear" bolt. The precise grip length (unthreaded shank) is designed to carry loads that act perpendicular to the bolt's axis, transferring these forces through the full diameter of the shank for maximum strength.
- Fatigue Resistance: The combination of superior material, rolled threads (formed after heat treat), and a large under-head fillet radius provides exceptional resistance to fatigue failure from the millions of stress cycles experienced in flight.
- NAS Certified Standard: As a certified National Aerospace Standard part, it guarantees full material traceability, dimensional accuracy, and quality control, ensuring it meets the stringent requirements for use in certified aircraft structures.
Technical Specifications
- Standard: NAS8602 (Bolt, 12 Point, Shear, 160 KSI)
- Full Part Number: NAS8602-2
- Material: High-Strength Alloy Steel (e.g., H-11)
- Finish: Cadmium Plated (or equivalent high-performance coating)
- Head Style: 12-Point Double Hexagon
- Thread Specification: #10-32 UNF-3A
- Nominal Diameter: #10 (0.190 inches)
- Threads Per Inch: 32 (Fine Thread)
- Overall Length: 0.625 inches
- Grip Length (Unthreaded Shank): 0.188 inches
- Minimum Tensile Strength: 160,000 PSI
Aircraft Compatibility
The NAS8602-2 is a universal high-strength fastener used across all categories of modern aviation where strength-to-weight ratio and reliability are paramount.
- Common Bombardier Platforms:
- Challenger 300
- Challenger 350
- Challenger 605
- Challenger 650
- Global 5000
- Global Express
- Global Express Extended Range
- Learjet 40
- Learjet 45 / 45XR
- Learjet 70
- Learjet 75
- CRJ Series Regional Jets
- Common Applications:
- Primary Airframe Structure: Joining major structural components like wing spars, fuselage frames, and pressure bulkheads.
- Engine Mounts & Pylons: Securing the engine mounting system to the airframe.
- Flight Control Surfaces: Used in the attachment of hinges and actuators for ailerons, elevators, and rudders.
Applications
The NAS8602-2 is the specified fastener for creating lightweight, high-strength, and fatigue-resistant joints:
- Shear-Critical Joints: The primary fastener for joints where loads are primarily transferred through shear action across the bolt's shank.
- High-Torque, High-Preload Joints: The 12-point head allows for the high torque needed to properly stretch the bolt, creating a powerful clamping force that increases the rigidity and fatigue life of the joint.
Why Choose NAS8602-2?
The structural integrity of a modern aircraft is built upon the performance of its high-strength fasteners. The NAS8602-2 is an engineered solution that provides a known, certified level of strength and fatigue resistance far beyond that of standard AN bolts. Using a genuine NAS-standard part is the only way to ensure the fastener has the correct material, heat treatment, and manufacturing processes required for a flight-critical structural joint. For the safety and integrity of the airframe, there is no substitute.
Order Your NAS8602-2 Bolts Now
Build and repair your aircraft with the certified, high-strength hardware the industry trusts for its most critical applications. Visit Airparts.aero to order your NAS8602-2 structural bolts today.
The NAS8602-2 is designed for a "bearing-type" structural joint. The precise grip length is critical; it must be selected to match the thickness of the materials being joined so that the unthreaded shank of the bolt, not the weaker threaded portion, is in the shear plane. The 12-point head provides a significant advantage by allowing a wrench or socket to apply torque on 12 small points, distributing the load more evenly and allowing for a higher torque input without rounding the corners, which is a risk with a standard 6-point hex head under very high torque. This ensures the joint can be tightened to the high preload required to prevent slippage and maximize fatigue life.
Note: This is a flight-critical structural component. It must only be installed where specified by the aircraft manufacturer's maintenance or structural repair manual. Installation requires the use of a calibrated torque wrench and a corresponding high-strength nut. The selection of the correct grip length is essential for a safe and airworthy installation.
