2019. 5. 7. · Then, the threads need to pass the inspections of the enlarged customized M13.2×0.3-6H +0.02/-0mm plug gauge before plating. After plating, the internal threads need to pass the inspections of a standard M13.2×0.3-6H plug gauge. Once they pass the inspection, they can be approved for shipment. If there is an external thread on the plated

Plug Gages While thread gages check the helical structures of a working part, plug gages check whether or not a given dimension (like a hole) is too large or small. These tools look like rods and also have a GO end and a NO-GO end. Again, if the hole has correct dimensions, then the GO end should enter easily while the NO-GO end should be stopped.

Go and NoGo Ring and Plug Gages are the most common type screw thread inspection 

Limit gauges are used in inspection because they provide a quick means of checking. The Go and No-Go principals of gauging are that the Go-end of the gauge must go into the feature of the component being checked and the No-Go end must not go into the same feature. There are different types of cylindrical plug gauges. Download Solution PDF,

Thread gauges are typically used to check tapped holes in a component, which is a simple method for inspecting threads. Thread gauges are a simple and effective 

Set thread plug gages are used to set thread ring gages only, while working thread plug gages will check a threaded machined part. A setting plug's purpose is strictly for setting or re-setting a thread ring gage and determining if the thread ring gage is within tolerance. Set thread plug gages are not to be used to check a threaded hole in a

Straight Pipe Thread Plug Gages. Straight pipe working plug gages are used to check the size of the internal threads of a part. Straight pipe setting plug gages calibrate and set a straight pipe thread ring. Setting plug gages inspect the ring gage for wear. GO or NOGO members. Precision hand lapped to provide optimum finish and superior accuracy.

There are also threaded plug gauges that are used to check threaded or tapped holes, and verify the proper thread type, major diameter, minor diameter, 

a) Thread plug gauge (GO and NO-GO): A thread plug gauge is used to check acceptance of a "nut" - i.e. an internally threaded part. For small threaded parts, the gauge will be double ended, with one end carrying the GO gauge and the other end, the NO-GO. For large parts, the two may be separate pieces.

Thread plug gauges should be marked with B/P or P/P designation for quick and easy identification. Finally the inspector should confirm the gages are calibrated 

they are used to inspect. Thread plug gage nomenclatures are the same as internal threaded products, thread ring gages are the same as external.