Keel bolts torque specs

Feb 21, 2018
31
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Does anyone know where I can find the technical info on the proper torque specs for the keel bolts on my 1987 Hunter Legend 37?

Thanks!
 
Feb 21, 2013
4,638
Hunter 46 Point Richmond, CA
Your torque specification will be based on the diameter of the bolt/stud and the alloy of the metal used to make it. Use a properly calibrated torque wrench. Large diameter bolts take an enormous amount of force. See posts #8 and #9 in this thread Keel bolt torque | Sailboat Owners Forums for keel bolt torque. But consult with an experienced boatyard.
 

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Apr 30, 2022
4
hunter 37.5 fort myers
Just wondering if anyone has the size and thread size for a keel bolts on a 37.5 hunter legend ?

thank you
 

RoyS

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Jun 3, 2012
1,739
Hunter 33 Steamboat Wharf, Hull, MA
Standard torque specifications based on fastener diameter may not apply here. Those standards assume the fastener is up against a metal casting or similar. With compressible materials like fiberglass and sealants under the fasteners Those torque values may be too high and may even damage (crush) the fiberglass. If the boat manufacturer has a suggested torque value for your particular application that would be useful. This is not to be compared with, say, torquing engine head bolts which is a much more exacting science.
 
Apr 5, 2009
2,774
Catalina '88 C30 tr/bs Oak Harbor, WA
The torque on the keel bolts has more to do with the material you are bolting to than the strength of the bolt.
 
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