Galvanized.
3/8-18 NPT thread.
Please note that this plug has NPT threads and is approximately 17mm in diameter, much larger than the standard 3/8″.
Fits:> S&S pan build prior to January 5, 2000; 99-17(NU)Dyna; 99-16(NU)FLT/Touring (front of oil pan)
