The Vermont Gage 421108530 Pipe Thread Plug is a go/no-go plug gauge that measures the outside diameter of threaded pipe and fittings. The tool steel plug gauge can be used to inspect tapered and straight threads, as well as internal fittings. The 3/4″ – 14 size is ideal for measuring NPSM threads. This plug gauge has an unfinished finish, which allows you to customize it by filing down sharp edges or paint it for identification purposes. If you are looking for a versatile tool that can help with inspection work, this VTG 421108530 Pipe Thread Plug is perfect for the job.