[PSUBS-MAILIST] coarse vs fine thread

hank pronk via Personal_Submersibles personal_submersibles at psubs.org
Sun Mar 22 11:55:52 EDT 2015


Help I need advice! 
My new bow dome will be secured to the Al mating ring with straps.  I am laying out the bolt holes to be threaded in the AL ring.  My question is, should the bolts be fine or coarse thread? What holds better in AL ?  The threads will be 3/8 by 1 in deep.
Thank you in advance.
Hank


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