Patent ID: 7877882
Filing Date: 2011-02-01
Classification: G01B

Abstract:
1. A method for checking standard and metric female thread bolt threads, male thread nuts, screw diameters and bolt lengths comprising threaded plug gauges and threaded ring gauges, further comprising a display wall structure mounting a standard female thread bolt and a metric female thread bolt checker comprising a series of standard and metric ring gauges and mounting a standard male thread nut checker and a metric thread nut checker comprising a series of plug gauges wherein each plug gauge is mounted with interior cavities in each plug gauge which matches the standard and metric female thread bolt thread bolt thread checker gauges also mounted as thread bolt checkers upon the said display structure; wherein said method also comprises the separate presence of a series of plug and ring gauges assembled upon a wire lanyard which match the gauge sizes of the ring and plug gauges mounted of the said structure wherein the separate set of individual plug and ring gauges that match the plug and ring gauge's thread sizes provides ready verification of bolt and nut thread sized sizes not conveniently checked by the plug and ring gauges mounted on said display structure; and wherein the ring and plug gauge systems known as “go” and “not go” gauge system for measuring the inside and outside of threaded fastener surfaces per specifications adopted by the American Petroleum Institute (API) for threading, gauging, and thread inspection of functional fit of components used in the gas and oil industry by rotating ring gauges, threaded nuts and bolts to determine resistance to rotation of the threaded test device, each plug gauge having a double end as a “go” end and as a “not go” end in the plug gauge and the threaded internal cavities wherein the ring gauges are threaded as a cylindrical ring of steel whose inside diameters are ground and honed so that a “not go” ring gauge will not pass over any part outside tolerance, the ring gauges being bored rings made in both “go” and “not go” dimensions in a cavity at each end of the plug gauge, where each ring gauge's internal cavity is internally threaded as a cylindrical ring of steel whose inside diameter is ground and honed according to specifications so that the “not go” ring gauge will not pass over any over-tolerance threaded part over specifications, wherein said ring gauge is a bored ring made in both “go” and “not go” specifications.