After enlarging holes in an assembly, which gauge should be used for inspection?

Using a Go/NoGo pin gauge for inspecting enlarged holes in an assembly is appropriate because this tool is specifically designed to verify the size of holes with precision. The Go/NoGo gauge consists of a pin that fits into the hole if it is within the specified limits (the "Go" side) and does not fit if the hole is too large or too small (the "NoGo" side). This dual-functionality allows for quick and effective assessment of whether the enlarged openings meet the required tolerances for the specific aviation or aerospace application, ensuring both safety and performance in the assembly.

In contrast, other gauges, such as a caliper gauge, depth gauge, or thickness gauge, are designed for different measurement tasks and would not provide the same straightforward pass/fail assessment that a Go/NoGo pin gauge offers for hole sizes. A caliper gauge might measure the dimensions along various axes but does not specifically validate the fit for assembly components. A depth gauge would measure the depth of holes but not the diameter, and a thickness gauge would assess material thickness rather than hole dimensions. Thus, the Go/NoGo pin gauge is the most effective tool for this particular inspection task.