How certification, traceability, testing, and low-volume production make some helicopter fasteners cost thousands of dollars, and why you cannot substitute generic hardware. A helicopter bolt can cost $8,000 because the price reflects certification, traceability, specialized materials and processing, and liability in a safety-critical, low-volume industry. In many cases the metal itself is a small fraction of helicopter bolt cost, the majority is the documentation and quality assurance needed to prove the part is airworthy.

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