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Fastener Library
Failure Analysis
Fastener Name
Aircraft Bolt
Functionality

Secure high-load and high-vibration assemblies in aircraft
Industry Used
Aerospace, defense, aviation
Functional Design
Precision-machined, close-tolerance, often with drilled heads or shanks for safety wiring
Aircraft Bolt
Thread Design
Partially externally threaded

10 - 30 years (depends on cycles)
Lifespan

Corrosion, thread damage, elongation
Signs of Failure

If corrosion, cracks, or stretch beyond limits is found
When to Replace

Follow torque specs, apply safety wire, inspect regularly
How to
Maintain

Visual inspection for corrosion and thread integrity, torque testing
Inspection

Every 6 months
Inspection Frequency
Analysis
When maintaining aircraft components, it's crucial to monitor signs of wear such as thread wear, elongation, and fretting corrosion. If these issues arise before the part has reached its expected lifespan of 10 to 30 years, it’s essential to take preventive measures. First, ensure the aircraft bolt is not exposed to conditions that exceed specified torque requirements. Apply safety wire as necessary and conduct regular inspections to catch potential issues early. If any corrosion, cracks, or excessive stretching are detected, it's imperative to replace the bolt immediately. Additionally, verify that the correct nut and washer combination is used to ensure proper functionality. For instance, use a self-locking nut and a flat washer with appropriate size and material specifications that match the bolt's requirements. Aircraft bolts are specifically designed for aerospace applications, so avoid using them in non-aerospace environments to prevent unnecessary costs. These bolts perform optimally in flight-critical or vibration-prone assemblies, where their specialized design provides reliability and safety.
Better Alternative
Use corrosion-resistant titanium alloy bolts for enhanced durability
Similar Fasteners
Structural Rivet, High-Tensile Screw
Type of Washer
Flat washer, locking washer
Type of Nut
Self-locking nut, castellated nut with cotter pin
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