INDIANA 1/2"-28T H: 13/32"
AMERICAN ELJER 1/2"-20T H: 11/32"
AMERICAN BRASS 1/2"-24T
A.M. STD. 9/16"-18T H: 3/8"
CRANE 13/16"-16T H: 1/2"
KOHLER H: 5/16" (NO THREAD)