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Title Standard No. Implemented On
Dryseal pipe threads with the thread angle of 60 degreesGB/T 27944-20112012-10-1
Pipe threads with the thread angle of 60 degrees where pressure-tight joints are made on threadsGB/T 12716-20112012-10-1
Unified screw threads - TolerancesGB/T 20666-20062007-7-1
Unified screw threads - General planGB/T 20670-20062007-7-1
Unified screw threads - Limits of sizes GB/T 20667-20062007-7-1
Unified screw threads - Basic dimensions GB/T 20668-20062007-7-1
Unified screw threads - ProfilesGB/T 20669-20062007-7-1
Pipe threads with 55 degree thread angle where pressure-tight joints are not made on the threadsGB/T 7307-20012001-9-1
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