Thread Plug Gauge

• A thread limit plug gauge is a combination of go plug gauge and no-go plug gauge.
• The scrap side of the thread plug gauge is marked with a red ring.
• The go end of the thread plug gauge must screw into the thread cut into a part by hand (without using excessive force).
• If unable to do so, the thread does not meet the requested standards..
• The scrap side of the thread plug gauge must not be able to be manually turned more than two turns into the cut thread (without using excessive force).
• If it can be screwed in more, the thread does not meet the requested standards.
• The reference temperature for parts and gauges is 20° Celsius.