Watts 3-Pack 3/8-in Sleeve Fitting in the Brass Fittings department at

Ideal for low to medium pressure applications, these 3/8 in. Brass Compression Nuts are perfect for use with brass sleeves. The brass construction is

Everbilt 3/8 in. Brass Compression Nut Fittings (3-Pack) 801159 - The Home Depot

Daptemn 36 PCS Brass Air Brake Line Fitting Assortment Kit 1/4 3/8 1/2 Inch DOT Air Line Quick Connect Fittings, Push to Connector NPT Thread Tube for Replace Air Line Fittings : : Electronics

Clippard

LTWFITTING Assortment Kit Tube OD 1/8 3/16 1/4 5/16 3/8 Brass Compression Nut Set (125-Pack) HF61S5MIX - The Home Depot

Watts 3/16-in x 1/4-in Adapter Fitting in the Brass Fittings department at

Watts 3/8-in Gold Brass Tee Fitting - Pre-assembled with Captive Sleeve - Easy to Install in the Brass Fittings department at

Ice Maker Water Line Brass Tube Fitting, 3/8 Male x 1/4 Compression - (2 Pack), Pipe Fittings - Canada

BRASS,Metric Fittings

Watts 3/4-in Brass Plug Fitting - Gold, Durable and Long Lasting in the Brass Fittings department at

PlumbShop Brass Compression Union Tube, 5/16-in OD, 1-pk