plug gauges are used to check tapered holes, koonusekujuline korkkaliiber, mis on ette nähtud kooniliste sisemõõtmeelementide mõõtmete kontrolliks, plug gauges, in some cases called taper pin gauges, are metrology tools whose purpose is to gage the inside diameters of tapered holes that have been drilled or machined into a manufactured part, component, or assembly