Do it Best 1/2 in. Nom Copper x 3/8 in. OD Union

Straight connector. 1/2 nominal 5/8 O.D. copper compression to 3/8 O.D. tube.
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Brass Copper Ferrule Tube Fitting, Union Compression Coupling 1/4 5/16 3/8 Compression Elbow Tee - China Brass Elbow, Tube Fitting

Tube Size:1/2 OD x 3/8 OD Package Content : 25 PCS(Include Nut And Ferrule) Materies: BRASS, Net Weight: 22g/PC Choosing products dimensions and

LTWFITTING 1/2-Inch OD x 3/8-Inch OD Compression Reducing Union,Brass Compression Fitting(Pack of 25)

68X2 by Danfoss, Compression Fitting, Male Connector

【Stright Flow Regulation】1/2 PTC x 3/8 OD compression stright stop valve connects water pipes to braided steel lines and ensures quick and easy

1/2 x 3/8 OD Compression Straight Stop Valve for PEX, Copper, CPVC Pipe and Water Line, Push to Connect Brass Plumbing Fitting, Quarter-Turn Shut

1/2OD X 3/8OD Brass Flare Union — COPPERTUBINGSALES

JMF Company 3/8 in. Compression X 1/4 in. D Compression Yellow Brass Reducing Union - Ace Hardware

BrassCraft 1/2 in. Nominal Compression Inlet x 3/8 in. O.D. Compression Outlet 1/4-Turn Angle Valve controls water flow to household plumbing fixtures