American standard Material: astm a 197; a153 Dimension: ansi/asme b16.3; b16.14; b16.39 Thread: ansi/asme b1.20.1 Size: 1/8 - 6" British standard Material: en 1562; iso 1460 Dimension: bs en 10242; bs 143 & 1256 Thread: iso 7-1 Size: 1/8 - 6" Din standard Material: en 1562; iso 1460 Dimension: din en 10242; din2950 Thread: iso 7-1 Size: 1/8 - 6"