Choosing the Right Aircraft Bolts for High Performance

Understanding Close-Tolerance Bolts for Aircraft Applications

Close-tolerance bolts, also known as AN-173 to AN-186, are designed for high performance aircraft applications where the bolted join faces severe load reversals and vibrations. When considering substitute options, it's essential to maintain similar properties in order to maintain the safety and performance of the aircraft. In this case, option c) AN-173 bolts would be a direct replacement, as they fall within the range specified.

However, substituting with other bolt types, e.g., AN-42 bolts, AN-31 bolts, or AN-188 bolts, may not be suited if they do not meet the close-tolerance ratings, which are created to withstand high load stresses and vibrations. Always consult appropriate aircraft engineering guidelines before replacing any aircraft bolt types.

It's crucial to ensure that the bolts used in high-stress aircraft applications are capable of handling the specific demands placed upon them. The close-tolerance bolts provide the necessary strength and durability to withstand severe load reversals and vibrations, which are common in high-performance aircraft operations.

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