ISO 7-1:1994 Preview
Pipe threads where pressure-tight joints are made on the threads -- Part 1: Dimensions, tolerances and designation
This standard was last reviewed and confirmed in 2015. Therefore this version remains current.
Specified the designation and lays down the dimensions and tolerances of pipe threads. Gives terms and definition as well as symbols and explanations including examples of the complete designation for a thread. Figures 1 to 4 illustrate details. Tabulates thread dimensions from 1/16 up to and including 6 inch.