CORRECT DRAIN PLUG FOR THE M809 SERIES FUEL TANKS. GASKET IS INCLUDED. NOS GENUINE US GOVERNMENT PARTS. 

PART #'s 11639437 PLUG, MS35769-31 GASKET

NSN 5365-00-880-7898 PLUG, 5330-01-352-3360 GASKET

REPLACEMENT GASKETS ARE ALSO AVAILABLE SEPARATELY IN THE STORE.