1、Threading and Gauging of Rotary Shouldered ConnectionsAPI SPECIFICATION 7-2SECOND EDITION,JANUARY 2017API MONOGRAM PROGRAM EFFECTIVE DATE:JUNE 6,2017ERRATA 1,AUGUST 2017ERRATA 2,NOVEMBER 2019ADDENDUM 1,MARCH 2020(API MONOGRAM PROGRAM EFFECTIVE DATE:OCTOBER 1,2020)Special NotesAPI publications necess
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