21.040.30 Special screw threads

Pipe threads where pressure tight joints are made on the threads - Part 2: Taper external threads and taper internal threads - Dimensions, tolerances and designation

Pipes threads where pressure tight joint are made on the threads - Part 3: Verification by means of limit gauges

Gas cylinders - 17E and 25E taper threads for connection of valves to gas cylinders - Part 1: Specifications (ISO 11363-1:2018)

Gas cylinders - 17E and 25E taper threads for connection of valves to gas cylinders - Part 2: Inspection gauges (ISO 11363-2:2017)

Gas cylinders - Parallel threads for connection of valves to gas cylinders - Part 1: Specification

Gas cylinders - Parallel threads for correction of valves to gas cylinders - Part 2: Gauge inspection