39-09 HARLEY JD SPARK PLUG. Fits 1909-1927 Harley Davidson. 7/8" 22mm
Reproduction Early Style Rebuildable spark plugs
Fits 1909 - 1927 Harley J JD
Plug is 7/8" or about 22 mm
Good Heat Range for these motors.
(Price is per pair)
See part number 1000-TN for Antique thumb nuts.