M22 is correct Mike Larry On 3/12/25, 4:01 PM, "Mike Drew via DeTomaso" <detomaso@server.detomasolist.com <mailto:detomaso@server.detomasolist.com>> wrote: All, I thought the gas tank drain plug was M22x1.5. Jack Pegoraro has a plug in his tank that is much smaller, something like 17.5 mm which makes me think it’s 3/8 NPT. Can anybody confirm the 1974 normal drain plug size, and actual OD of the plug? Mike Sent from my iPad _______________________________________________ Detomaso Email List is not managed by POCA Posted emails must not exceed 1.5 Megabytes DeTomaso mailing list -- detomaso@server.detomasolist.com <mailto:detomaso@server.detomasolist.com> To unsubscribe send an email to detomaso-leave@server.detomasolist.com <mailto:detomaso-leave@server.detomasolist.com> To manage your subscription (change email address, unsubscribe, etc.) use the links above. Members who post to this list grant license to the list to forward any message posted here to all past, current, or future members of the list. They also grant the list owner permission to maintain an archive or approve the archiving of list messages.