[PSUBS-MAILIST] coarse vs fine thread

hank pronk via Personal_Submersibles personal_submersibles at psubs.org
Sun Mar 22 14:11:58 EDT 2015


Rick,
Thanks' I will go with fine.
Hank--------------------------------------------
On Sun, 3/22/15, Rick Patton via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Subject: Re: [PSUBS-MAILIST] coarse vs fine thread
 To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
 Received: Sunday, March 22, 2015, 1:58 PM
 
 Hank
 Fine is
 the only way to go as aluminum is a much softer metal than
 steel so it will strip much easier so the more metal you
 grab, the better, which fine threads will give you.
 Rick
 On Sun, Mar 22, 2015 at
 5:55 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
 wrote:
 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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