KOHLER H: 5/16" (NO THREAD)
CRANE 13/16"-16T H: 1/2" 沖12.4MM六角
A.M. STD. 9/16"-18T H: 3/8" 沖6.4MM六角
AMERICAN BRASS 1/2"-24T 沖6.3MM四角
AMERICAN ELJER 1/2"-20T H: 11/32" 沖6.5MM四角