I'm looking to order several high-strength magnetic sump plugs for an FD - are the oil & gearbox & diff oil sump plugs all the same thread & pitch does anyone know? If so, what thread/pitch are they?

These ones: www.magneticoildrainplugs.co.uk - they look to be a pretty effective unit.

 

No, they are different sizes. Besides, the transmission and, IIRC, the differential both already have magnatized drain plugs.
You have to be a little careful of overall length. Some sold ostensibly for "all Mazdas" are too long and bottom out on the pan baffle.
Check this thread for some other options... https://www.rx7club.com/showthread.p...light=magnetic

 

Thanks for that Sgtblue, had a good read there & some interesting results. Do you know the thread/pitch of the stock oil/box/diff plugs by any chance?