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Product Description--API Plug Gauge And Ring Gauge
API Thread Gauges are used for gaging API internal & external threads, manufactured according to API 5B, API 7-2 & API 11B standard, including working gages and master gages.
The APISPEC 5B standard stipulates that commonly used casing threads are round threads (abbreviated as CSG) and buttress threads (abbreviated as BCSG).
API round thread gauges are divided into casing short round thread gauge (English abbreviation CSG) and casing long round thread casing gauge (LCSG). The English abbreviation of the tubing round thread gauge is TBG, which is subdivided into Non-upset tubing thread gauge (TBG) and External upset tubing thread gauge (UP TBG)
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The surface is packed with rust-removing paper, as shown in the picture below .
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Product detail pictures
13-3/8 BCSG working gauge