Wendell,

   According to my Copper State Bolt & Nut handbook, M12 bolts come
in two threads: coarse - 1.75 and fine - 1.5.  I'd send you to their web
site, but it appears they are redesigning it.

[ www.copperstate.com ]

Best Regards,
Dale R.
COZY MkIV #1254
http://members.cox.net/rogersda/Products.htm


Wendell Voto wrote:  

----- Original Message -----

From: Lehanover@aol.com

To: Rotary motors in aircraft

Sent: Thursday, July 05, 2007 12:27 AM

Subject: [FlyRotary] Re: Bolt size

In a message dated 7/5/2007 12:06:50 A.M. Eastern Daylight Time, jwvoto@itlnet.net writes:

I need to know the size of the larger bolt that goes thru the oil pan and was part of the original engine mount in a car. I think it may be 12mm x1.25 but can' find any that size. The original one I have are too long and if you would cut them off all the threads would be lost.

Wendell