Go/no-go gauge
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A go/no-go gauge is an inspection tool used to check a workpiece against its allowed tolerances via a go/no-go test. Its name is derived from two tests: the check involves the workpiece having to pass
A pair of go and no-go gauges
Hardened and ground plug gauge
Replaceable thread and plug gauges
A set of pins from 1.550 to 6.725 mm
Headspace (firearms)
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In firearms, headspace is the distance measured from a closed chamber's breech face to the chamber feature that limits the insertion depth of a cartridge placed in it. Used as a verb by firearms desig
Go/no-go gauge
…manner. These will often be made to order by the toolmakers, or a related skilled tradesman. Go/no-go gauges play an integral part in setting the correct headspace during gunsmithing. In order for the chamber to be in-spec, the bolt must close without resistance on the go gauge, but it must not close completely…
Headspace positioning of rimless, rimmed, belted and straight cartridges
Several different rimmed, .22 rimfire cartridges, which have a uniform forward diameter, and which have headspace on the rim, allowing any length of cartridge shorter than the maximum size to be used in the same firearm
Firearms chambered for tapered rimmed cartridges like this .303 British cannot safely fire shorter cartridges.