What size and thread pitch for motor mount nut?

Bad89stang · 09-23-2003, 11:32 PM

After installing my longtubes, I noticed that the motor mount nuts were not threading on properly. What is the correct size and thread pitch for factory motor mounts?

billheis · 09-25-2003, 07:15 PM

Ive got a set in the garage that I just looked at. I do believe its 9/16 x 13. I tried putting a half in. tap on it and it was to small. But I measured the tread pitch and it is 13
Bill

Bad89stang · 09-25-2003, 07:21 PM

It was 14mm x 2 (pitch)

We found some old stock ones and took them up to the hardware store.

billheis · 09-25-2003, 07:39 PM

Could be, as I said tried 1/2 tap well actually die and it didn't fit. But with thread pitch gauge 13 fit which is probably pretty close

09-23-2003, 11:32 PM	#1
Bad89stang Registered Member Join Date: Aug 2001 Location: Ft. Worth, TX Posts: 456	What size and thread pitch for motor mount nut? After installing my longtubes, I noticed that the motor mount nuts were not threading on properly. What is the correct size and thread pitch for factory motor mounts?

09-25-2003, 07:15 PM	#2
billheis Registered Member Join Date: May 2001 Location: Fernandina Beach, FL 32034 Posts: 178	Ive got a set in the garage that I just looked at. I do believe its 9/16 x 13. I tried putting a half in. tap on it and it was to small. But I measured the tread pitch and it is 13 Bill __________________ Bill Heiser 90 Convertable 5.0 LX, ported E7s w/ THumper valve job, TFS street, FR 65mm TB, B cam w/1.7 cobra rockers, kirban AFPR, Mac CAI, Mac Headers, off road h, 3 chamber flows, Crane ign. box, 3:73s, Art Carr AOD & 2600 converter

09-25-2003, 07:21 PM	#3
Bad89stang Registered Member Join Date: Aug 2001 Location: Ft. Worth, TX Posts: 456	It was 14mm x 2 (pitch) We found some old stock ones and took them up to the hardware store. __________________ You're gonna need your seatbelt

09-25-2003, 07:39 PM	#4
billheis Registered Member Join Date: May 2001 Location: Fernandina Beach, FL 32034 Posts: 178	Could be, as I said tried 1/2 tap well actually die and it didn't fit. But with thread pitch gauge 13 fit which is probably pretty close __________________ Bill Heiser 90 Convertable 5.0 LX, ported E7s w/ THumper valve job, TFS street, FR 65mm TB, B cam w/1.7 cobra rockers, kirban AFPR, Mac CAI, Mac Headers, off road h, 3 chamber flows, Crane ign. box, 3:73s, Art Carr AOD & 2600 converter

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