S&S, Coter Drain Cap 3/8-18 NPT for Harley-Davidson

Galvanized.
3/8-18 NPT thread.
Keep in mind that this plug has NPT and approx. 17 mm in diameter and much larger than 3/8 "normal.

Compatible with:> Manufacture of S&S crankcase. Before January 5, 2000; 99-17 (NU) Dyna; 99-16 (NU) flt/touring (front of the oil crankcase)