This is the bronze quill/plunger used to feed oil to the Big End Bearing, fits all SOHC engines.
Pre 1938 OHV/SV engines with a timing case that had a 'through type' jet holder also used the same quill and jet holder as this (this quill was called part number 9011 pre-war), so this also fits those models. Sorry, later OHV/SV models with a plain timing case used a different quill holder with no external nut - which we do not make yet (early 2020) - email us if you require parts for these later OHV/SV models for availability.
Note : These plungers are NOT interchangeable with the Cambox Feed Quill/Plunger, as that plunger has a smaller feedhole! If you have a cambox with that quill type fitted, make sure you keep them seperated. If you have a box of old quills and are not sure if you may have quill of the wrong type, email us on sales email for information on hole size correct for Bigends.