Gas cylinders - Parallel threads for connection of valves to gas cylinders - Part 1: Specification
This document specifies definitions, dimensions and tolerances of parallel screw threads of M30 x 2, M25 x 2 and M18 x 1,5, for the connection of valves to medical and industrial gas cylinders.
This document does not contain the connection requirements for:
- mechanical strength;
- gas tightness;
- capability of repeated assembly and dismounting operations (this aspect is covered in ISO 13341).
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Version 1 - 2026-06-22
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