Onoto 'Minor' & 'Stylo' type Plunger
This plunger is specially designed for the MINOR type Onoto and the STYLO and has been produced using original specifications.
It is attached to the rod by a 5ba left hand thread and is black in colour.
This plunger has no ink shut off in the design.
Each plunger purchased comes complete assembled with a 7.65mm diameter rubber washer and 0.6mm hard support washer as in the original pen design and is held together with a 0.85mm diameter carbon fibre pin.