TR3 Block Drain Spigot

["Bill Brewer" <bbrewer@qnet.com>]

     The block drain on the side of my TR3 engine has always dripped. I took
it apart and lapped it, but it still had a slow drip. I am re-assembling the
engine after a rebuild and contemplating doing something else with this
spigot. The local parts store only has spigots in pipe thread sizes. I am
tempted to use a bolt and a copper washer.
     Do any listers have remedies for this?

     Bill Brewer
     Tehachapi, California