Hamlet 768LOB SS 3/4 x 1-1/16-12 316 Stainless Steel Let-Lok Compression Fitting, Adapter, 1-1/16-12" SAE Male x 3/4" Tube OD: Compression Bulkhead Fittings: Amazon.com: Industrial & Scientific
Amazon.com: RFS Stainless Steel SS316 Compression Reducing Union Fitting, 3/ 4" OD x 3/8” OD, Heavy Duty Double Ferrule Reduced Union Coupling Adapter Connector, for Hydraulic Plumbing System : Industrial & Scientific
Stainless Steel Compression Tube Nuts - 3/4"
Stainless Steel Compression Fitting Male Connectors - 3/4"T x 3/4"NPT