NO-GO gauges are designed to check the minimum metal conditions i.e. Maximum hole limit and Minimum shaft limit.This No-Go thread gauge is marked in red. This thread NO-GO ring gauge must not screw into the part by hand by more than two threads. The reference temperature for parts and gauge is 20C. It is made from high-quality raw material. This gauge is mostly used as an inspection tool.The thread NO-GO ring gauge must not screw into the part by hand more than two threads (without using excessive force). If the ring gauge can be screwed into the thread by more than two threads, the thread does not meet the desired requirements (=scrap). The no-go thread gauges are marked in red. The reference temperature for parts and gauges is 20 Celsius.

440NGR UNC N0-Go Ring Gauges Description : Thread ring gauge No Go Size & TPI : 4 X 40 Class : 2A BS 1580 Tolerance to BS 919 Blanks to BS 1044