9,5 mm (3/8") Shut-off Valve
Pipe Joint Sealant that resists action of LP gas.
9,5 mm (3/8" NPT) Brass Pipe Fitting Hex. Adapter
Copper Tube with 9,5 mm (3/8") Conical Washers
The copper tube should be long enough to reach the gas supply.
Never use an old connector when installing a new range.
Liquid Leak Detector or Soapy Water