Stainless Steel, 3/8 MNPT x 3/8 Compression Fitting

Stainless Steel 1/2 NPT Pipe Compression Fitting 3/8 & 1/2 Tube Con – Home Brew Stuff

Everbilt 3/8 in. OD Compression x 3/8 in. MIP Brass Adapter Fitting 800669 - The Home Depot

MC-10-6N, Flared Fittings, Dual Ferrule

LTWFITTING 3/8 in. O.D. Comp x 1/8 in. MIP Brass Compression Adapter Fitting (25-Pack) HF686225 - The Home Depot

Everbilt 3/8 in. OD Compression x 3/8 in. MIP 90-Degree Brass Elbow Adapter Fitting 800859 - The Home Depot

6-DMC-6 Dixon Instrumentation Fitting - Stainless Steel Male Connector - 3/8 Tube OD x 3/8-18 Male NPT (Pack of 10) — HoseWarehouse

3/8 x 3/8 90° Chrome Plated Compression x Female Elbow

1/2 OD Tube Stub x 1/2 Male NPT Adapter Stainless Steel 316

Stainless Steel Compression Male Bulkhead Connectors

MCN Male NPT Connector, Stainless Steel Compression Fittings