2015NF E48-050-4:2015 Connections for fluid power and general use - Ports and stud ends with ISO 261 metric threads and O-ring sealing - Part 4 : dimensions, design, test methods and requirements for external hex and internal hex port plugs
0000 NF E48-050-4:2006
1984NF E27-433:1984 Metric screw hexagon head metal plugs with collar joints for use with O. Rings.