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[PSUBS-MAILIST] thru hull fittings



Hi All,    I am in the process of machining thru hull fittings (316L ss) that will have 1/2" shafts running through them to turn valves, turn rudders, and other functions as well, drop weight, and possibly move trim ballast ;-)     .  The fittings that I am machining at the moment are 1 1/4" od  with the 1/2" id ( for the shaft)  is that 1 1/4"  a big enough chunk of steel to be welded through 1/4" A516 70   or should that OD be larger for some reason?
 
Thank You
 
Brian Cox