achamfered on odd opposite end 3/32 in. by 45 deg, bchamfered on odd opposite end 3/32 end 3/32 in. by 45 deg N1 outside hexagon or octagon (partial or full thread optional)
Used on clark model 290m;tractor,wheeled,ind.,diesel driven;med dbp,nsn 2420000889384,w/rops nsn 2420010590090. right-hand external npt external thread series