Larry, I don't know if you got an answer to your question, so I thought I'd throw my $.02 in. I believe it is a pipe thread. It does have a taper to it like a pipe thread. My '74 Spit is in storage, so I can't measure mine, but it is either a 1/4" or a 3/8". According to this Wiki site, the 1/4" is .518" in diameter. The 3/8" thread is .656" in diameter. My memory says the plug is about 1/2" in diameter, so I'm thinking a 1/4" pipe thread is what is there. The website is http://en.wikipedia.org/wiki/British_standard_pipe_thread if you want to read more.
Hope that helps. BillG '74 Spitfire -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Quirk Sent: Saturday, March 09, 2013 8:49 PM To: [email protected] Subject: [Spits] Oil pan drain bolt Anyone know the thread size (diameter) and pitch of the oil pan drain bolt for a 1980 Spitfire? Car is in storage and I was thinking of getting a Fumoto valve to install if spring ever comes. Many thanks ....Larry Qu. _______________________________________________ [email protected] Donate: http://www.team.net/donate.html Suggested annual donation $11.47 Archive: http://www.team.net/archive Forums: http://www.team.net/forums Unsubscribe/Manage: http://autox.team.net/mailman/options/spitfires/[email protected]
