External Oil Filter Canister - Retaining Hardware

[Iacovos]

Hello everyone

I am a bit confused with the external oil filter canister retaining hardware.
The parts catalogue shows a acorn nut (63852-48) and a washer (63858-49) which is steel i believe.
Aftermarket rebuild kits give a normal style nut and a copper washer.
Why was the acorn nut and steel washer dropped by the aftermarket?
Which combination seals best the canister not to leak?
Is any form of grease or gasket sealant reccomended?

Thank you

[Saddletramp]

I believe there is a small diameter steel washer and possibly two nuts below the filter on the inside bottom of the canister and the 63858-39 (asbestos or maybe it is copper on mine) washer and acorn nut outside retaining the canister. The asbestos or copper washer is the solution for a seal. I have never used a sealant on the bottom of the can.
James

[otis71]

Originally all seals were made of gasket material. Where the canister mates to the top has a tendency to weep a little over time but I found a dry gasket works best on this application.