Onoto 1000 Plunger
This plunger is specially designed for the LEAKPROOF 1000 pen also known as 'the long slim ' model
It is attached to the rod by a 5ba left hand thread and is black in colour. The main body and the shut off part are assembled using the same 5ba L/H thread which ensures a good seal with the washer
This plunger has an ink shut off cone in the design and does NOT require a hard backing washer behind the rubber washer.
Each plunger purchased comes complete assembled with a 7.78mm diameter rubber seal and is held together with a 0.8 mm diameter pin
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