M 9.4 x.5 tap
U .S.A. made steel tap
This tap makes the threads for the front of the piston filler. The back brass piece that slides on the hexagonal shaft is m 8 x.75.
It also fits the #8 Jowo feed assembly.
Tool Kit for the filler
Two brass nut drivers , one to fit the steel left hand thread nut and one to fit the little brass nut at the back of the filler.
Dimensions are for general information only and should be verified.