Keel bolt sizes Socket size Torque
3/8" 9/16" 21 foot pounds
1/2" 3/4" 45 foot pounds
3/4" 1-1/8" 132 foot pounds
1" 1-1/2" 325 foot pounds
1-1/4" 1-7/8" 546 foot pounds
Models Number of studs & size
H336 5 x 3/4", 1 x 1/2" and 1 x 3/8"
H340 2 x 1" and 3 x 1-1/4"
H356 2 x 1/2" and 6 x 1"
H37.5 7 x 1" and 1 x 3/8"
H37.6 7 x 1"
H40.5 3 x 1"
H410 7 x 1" and 1 x 1/2"
P42 & H43 7 x 1" and 1 x 1/2"
P450,P456 & H460,466 and 46 7 x 1"
H49 9 X 1" (some keels have 9 x 1" plus 1 x 3/4" aft)