SS-AM-FT4-NS8-EC79
316 SS, FITOK 6D Series Tube Fitting, Male Adapter, 1/4" O.D. × 1/2 Male NPT, Hydrogen Application & Europe EC79 Certified
SS-CM-FL4-NS8-HG
316 SS, FITOK 6D Series Tube Fitting, Male Connector, 1/4" O.D. × 1/2 Male NPT, Hydrogen Compliant & Comply to EU EC79 Test Standard (if you need EC79 Approval, replace -HG with -EC79)