M6.5 x 0.5 Tap For Bock Size 5 Nib Unit
M6,5 x 0,5 taps for size 5 unit with Bock Nib.
Use this tap to thread the fountain pen section, to accommodate the size 5 Bock nib
The Old new stock Of Conway Stewart Lady Fountain Pen Nibs
Tap is suitable for plastics, resins and soft metals.
Tap can be used by hand or attaching it in your lathe tailstock.
(Temp Library Photo)