Beckett part #213U-HD-3B-18 Oil Burner Nozzle Adapter-1/8″ NPT x 9/16″-24 TPI
Nozzle Adapter #213U. (nozzle end 9/16″ x 24 TPI) practically insures that there will be no leakage of fuel between the nozzle adapter threads and the nozzle threads! Fits standard nozzle line ‘J tube’ assemblies (which are 1/8″ NPT) and standard sized nozzles (with a 9/16″-24TPI nozzle thread).