After installation of the Hi-Lok, which gauge is used to check the protrusion height?

The correct answer hinges on the specific functionality of the gauge used to measure the protrusion height of a Hi-Lok fastener once it has been installed. A Go/No-Go gauge is designed to provide a simple pass/fail assessment of a part's dimensions in relation to its specified tolerances.

In the context of checking the protrusion height of a Hi-Lok, this gauge helps ensure that the fastener is properly seated and that its height meets the manufacturer’s specifications. If the Hi-Lok protrudes too much or not enough beyond the surface of the material, it could affect the structural integrity of the assembly or the performance in service. The Go/No-Go gauge specifically allows for quick checks without needing precise measurements, making it ideal for quality assurance in the fastener installation process.

Other types of gauges, while they have their applications in various measurements, do not serve the same quick assessment function for protrusion height. For instance, a thickness gauge may measure material thickness, a depth gauge measures depth dimensions, and a length gauge measures overall length, but they do not provide the specific binary result that the Go/No-Go gauge does for protrusion verification.