Onoto 'O' & 'N' plunger

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This plunger is specially designed for the 'O' & 'N'  type leakproof Onoto and has been produced using original specifications.

Due to the unique design of this plunger NO separate backing washer is required which improves the design and gives a better seal

It is attached to the rod by a 5ba left hand thread and is black in colour. The main body and the end part are assembled using the same 5ba L/H thread which ensures a good seal with the rubber washer

Each plunger purchased comes complete assembled with a 7.78mm diameter rubber washer and  is held together with a 0.8mm diameter  pin

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