Common questions

What are thread setting plug gages used for?

What are thread setting plug gages used for?

Thread Setting Plug Gages are used to inspect, calibrate and set adjustable thread ring gages. Vermont Gage inventories a broad range of Adjustable Thread Ring Gages used to inspect both the Unified Inch and M Series Metric product threads.

What’s the truncated setting on a thread Gage?

Truncated Setting: Use this gage to calibrate and set an adjustable thread ring gage and inspect it for wear. The crest of the thread is truncated in diameter for the first half of the set plug and “full form” on the remaining length.

What is the tolerance for a thread Gage?

Standard thread gages are made to a Class X tolerance. Gages may be purchased individually or as assemblies. Plug gage assemblies are marked with the thread size, class of fit and pitch diameters. Pipe Gages per ASME B1.20.1, ASME B1.20.5 and Hole Location gages stocked.

Which is larger a setting plug gage or a go Gage?

The setting plug gages will have a go pitch diameter that is larger than the no-go pitch diameter. If someone used a truncated setting plug to inspect internal product threads, they would produce 100% scrap. Any internal product thread the go setting plug entered, would also allow the smaller no-go to enter.

Thread Setting Plug Gages are used to inspect, calibrate and set adjustable thread ring gages. Vermont Gage inventories a broad range of Adjustable Thread Ring Gages used to inspect both the Unified Inch and M Series Metric product threads.

The setting plug gages will have a go pitch diameter that is larger than the no-go pitch diameter. If someone used a truncated setting plug to inspect internal product threads, they would produce 100% scrap. Any internal product thread the go setting plug entered, would also allow the smaller no-go to enter.

Standard thread gages are made to a Class X tolerance. Gages may be purchased individually or as assemblies. Plug gage assemblies are marked with the thread size, class of fit and pitch diameters. Pipe Gages per ASME B1.20.1, ASME B1.20.5 and Hole Location gages stocked.

Can a Class 6H Gage be used for a no go Gage?

A Class 6H metric internal thread is inspected with a class 6H go / no-go working plug gage. Truncated setting plug gages for adjustable thread ring gages tend to cause some problems and confusion. Many of these problems are due to misunderstanding the purpose of the truncated setting plug gage. Truncated setting plug gages have only one purpose.

Author Image
Ruth Doyle