https://www.augustindustries.com/product/handtight-connector-helium/
Handtight Connector, Helium - August Industries LLC
Aug 10, 2021 - CGA-580 Hand-Tight filler used to connect to a cylinder with same style connector. CGA-580 is most commonly used for NITROGEN or HELIUM services at pressures...
connectorheliumaugustindustriesllc
https://evergreenmidwest.com/cga-580-handtight-nut-for-argon-helium-nitrogen-2-egm.html
CGA 580 Handtight Nut for Argon, Helium, Nitrogen
CGA-580 Handtight Nut for Argon, Helium, Nitrogen Argon, Helium, Nitrogen 3000 psi .960"-14NGO-RH-EXT
cganutargonheliumnitrogen