OD tube fitting both ends
Item # 2841, 3/8 to 5/16 (8mm) Reducing Compression Union On FMSI Automotive Hardware
EZ-Flo Parts
Swagelok, SS-810-3-8TMT, Stainless Steel Swagelok Tube Fitting, Male Run Tee : Industrial & Scientific
REDUCING COUPLING: Joins 2 Pipes Securely within Instrumentation, Hydraulic, and Pneumatic Applications; Works with Aluminum, Plastic, and Copper
Highcraft D62S-1238-OM Compression Reducing Union Pipe Fitting 1/2 X 3/8 OD. Connection Lead-Free Brass : Everything Else
Swagelok B-200-61 Brass Tube Fitting, Bulkhead Union, 1/8 Tube OD, 0: : Industrial & Scientific
LTWFITTING Brass 5/16 OD x 3/8 Male NPT Compression Connector Fitting(Pack of 5) : Industrial & Scientific
Ez-Flo 65369LF 5/8 X 3/8 Compression Reducing Union
3/8 Brass Comp x 1/4 Comp Reducing Union
Union – Reliable Fluid Systems
SS-1210-6-4 Swagelok Reducing Union Connector, 3/4 Tube : OD Compression x 1/4 Tube : OD Compression, 316 Stainless : Industrial & Scientific
Compression Fittings Stainless Steel - 3/8 Tube Union Tees
Swagelok B-200-61 Brass Tube Fitting, Bulkhead Union, 1/8 Tube OD, 0: : Industrial & Scientific
LTWFITTING 3/8-Inch OD x 1/4-Inch OD Compression Reducing Union,Brass Compression Fitting(Pack of 5) - Compression Fitting Ferrules