Gas tank drain plug size?
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
Mike, Your memory servs correct for early cars, U believe there were two sizes, later cars being 16mm x 1.5 Julian ________________________________ From: Mike Drew via DeTomaso <detomaso@server.detomasolist.com> Sent: Wednesday, March 12, 2025 4:01 PM To: De Tomaso Forum <detomaso@server.detomasolist.com> Subject: [DeTomaso] Gas tank drain plug size? 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 To unsubscribe send an email to 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. Mike, Your memory servs correct for early cars, U believe there were two sizes, later cars being 16mm x 1.5 Julian __________________________________________________________________ From: Mike Drew via DeTomaso <detomaso@server.detomasolist.com> Sent: Wednesday, March 12, 2025 4:01 PM To: De Tomaso Forum <detomaso@server.detomasolist.com> Subject: [DeTomaso] Gas tank drain plug size? 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 To unsubscribe send an email to 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.
Dear Mike, I measured my stock '74 gas tank drain plug with teflon on the threads and found a diameter of 22.5 mm. I was not able to measure the pitch with the plug in situ. I believe that it is a metric 22 mm diameter plug. Chuck Engles -----Original Message----- From: Mike Drew via DeTomaso [mailto:detomaso@server.detomasolist.com] Sent: Wednesday, March 12, 2025 6:02 PM To: De Tomaso Forum Subject: [DeTomaso] Gas tank drain plug size? 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 To unsubscribe send an email to 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.
Thanks Chuck! Mike Sent from my iPad
On Mar 13, 2025, at 08:59, Charles Engles <cengles@cox.net> wrote:
Dear Mike,
I measured my stock '74 gas tank drain plug with teflon on the threads and found a diameter of 22.5 mm. I was not able to measure the pitch with the plug in situ.
I believe that it is a metric 22 mm diameter plug.
Chuck Engles
-----Original Message----- From: Mike Drew via DeTomaso [mailto:detomaso@server.detomasolist.com] Sent: Wednesday, March 12, 2025 6:02 PM To: De Tomaso Forum Subject: [DeTomaso] Gas tank drain plug size?
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 _______________________________________________
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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.
Maybe my initial response got lost, I don't know how to access the list archives any longer? There are two sizes, both metric and both 1.5 thread pitch, one is 22mm the other 16mm. If Jack has something smaller than a 22mm, then there's a good chance it's 16mm! Julian ________________________________ From: Larry Stock <larrys@panteraparts.com> Sent: Thursday, March 13, 2025 10:06 AM To: Pantera Mike Drew <mikeldrew@aol.com>; De Tomaso Forum <detomaso@server.detomasolist.com> Subject: [DeTomaso] Re: Gas tank drain plug size? 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. _______________________________________________ Detomaso Email List is not managed by POCA Posted emails must not exceed 1.5 Megabytes DeTomaso mailing list -- detomaso@server.detomasolist.com To unsubscribe send an email to 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. Maybe my initial response got lost, I don't know how to access the list archives any longer? There are two sizes, both metric and both 1.5 thread pitch, one is 22mm the other 16mm. If Jack has something smaller than a 22mm, then there's a good chance it's 16mm! Julian __________________________________________________________________ From: Larry Stock <larrys@panteraparts.com> Sent: Thursday, March 13, 2025 10:06 AM To: Pantera Mike Drew <mikeldrew@aol.com>; De Tomaso Forum <detomaso@server.detomasolist.com> Subject: [DeTomaso] Re: Gas tank drain plug size? M22 is correct Mike Larry On 3/12/25, 4:01 PM, "Mike Drew via DeTomaso" <detomaso@server.detomasolist.com <[1]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 <[2]mailto:detomaso@server.detomasolist.com> To unsubscribe send an email to detomaso-leave@server.detomasolist.com <[3]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. _______________________________________________ Detomaso Email List is not managed by POCA Posted emails must not exceed 1.5 Megabytes DeTomaso mailing list -- detomaso@server.detomasolist.com To unsubscribe send an email to 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. References 1. mailto:detomaso@server.detomasolist.com 2. mailto:detomaso@server.detomasolist.com 3. mailto:detomaso-leave@server.detomasolist.com
participants (4)
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Charles Engles -
Julian Kift -
Larry Stock -
Mike Drew