The Plumber's Choice 5/8 in. Straight Copper Coupling Fitting with Rolled Tube Stop (5-Pack) 0058CCRC-5 - The Home Depot
30902 - Elkhart 30902 - 5/8" Copper Coupling
Appli Parts AP-A138 1-3/8in Wrot Copper Coupling fitting C x C Sweat connections for refrigeration, air conditioning and plumbing applications ACR and Type L copper pipe (5 x Bag)