Dave,
This thread usually comes around this time of year as everyone contemplates doing the needed work on their boats. This comes from previous threads and is a little more complete on the torque specifications for all the different keel bolt stud sizes.

MODEL/SIZE    BOLT DIAMETER    FOOT LBS.    SOCKET NUT
MEGA ONLY            3/4                            90                   1-1/8''

C&C 40                      1-1/4                         450                1-7/8''
 
ALL OTHER               1/2                            80                   3/4
MODELS                    3/4                            250                 1-1/8
                                    1''                             350                  1-1/2''

Now, does anyone know what Stainless Steel (i.e. 13-8, 15-5, 17-4, 18-8/300 series) that the Keel Studs are made from?  I will start trying to figure it out when I start going back to the boat if no one knows.

Oh well, its only a couple of months until work starts and the really good news is its only a week away from Strictly Sail in Chicago.  We plan to go shopping at the show for a roller furler and new head sail.  Look out world were ready for the nineties

Some years ago I replaced the ferrous steel plates under the keel bolt nuts on Impulse, a 1972 35 MK1 ( now owned by Tom& Kate). I called the C&C Design group and was given the following torque specs.
3/4" bolt 200 ft lbs
1" bolt 350 ft lbs
1 1/4 bolt 450 ft lbs
I saved my notes just in case. Hope this is helpful. I believe these specs were good for other models, but don't know which ones.
Dave "Webfoot" 37K/cb 1983