What types of precision measuring instruments can be used to measure the outside dimensions of aircraft parts?

To measure the outside dimensions of aircraft parts accurately, outside micrometers and vernier calipers are ideal precision measuring instruments.

Outside micrometers are specifically designed to measure the thickness or outside dimensions of an object with high precision, typically to the nearest thousandth of an inch or hundredth of a millimeter. Their construction allows them to provide consistent and accurate readings across various measurements, which is crucial in aviation to ensure parts meet specified tolerances.

Vernier calipers, on the other hand, offer versatility, enabling the measurement of both internal and external dimensions, as well as depth. They can provide measurements with a high degree of accuracy, often down to one hundredth of a millimeter (0.01mm) depending on the design. The sliding scale of the vernier caliper facilitates precise readings, making it a valuable tool in the aircraft maintenance field.

These instruments are essential for maintaining aircraft components within specified tolerances, thereby ensuring safety and performance. The combination of high accuracy and ease of use makes outside micrometers and vernier calipers particularly suited for the requirements of aircraft maintenance and repair.