MK15diver
Vintage Diver
Posts: 93
Joined: Thu Feb 07, 2008 8:45 pm
Location: Woodbridge, Virginia
Contact: Website AOL

Thread Size Question

Fri Oct 14, 2022 7:02 pm

Just curious as to what the thread size is on the internal side of the HP diaphragm where the adjustment nut is inside the regulator of a DA and the like?
Someone told me that diving a double hose reg will kill me. I had no idea these things were dangerous.

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luis
VDH Moderator
Posts: 1747
Joined: Thu Jun 30, 2005 9:28 pm
First Name: Luis
Location: Maine

Re: Thread Size Question

Fri Oct 14, 2022 8:30 pm

The outside of the HP diaphragm clamping nut is 1-3/8" 18 tpi UNEF threads.

The IP adjustments screw is 7/8" 14 tpi UNF threads
Luis

Buceador con escafandra autónoma clásica.

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ScubaLawyer
Master Diver
Posts: 1649
Joined: Thu Apr 08, 2010 11:25 am
First Name: Mark
Location: Laguna Beach, CA

Re: Thread Size Question

Fri Oct 14, 2022 9:38 pm

luis wrote:
Fri Oct 14, 2022 8:30 pm
The outside of the HP diaphragm clamping nut is 1-3/8" 18 tpi UNEF threads.

The IP adjustments screw is 7/8" 14 tpi UNF threads
Showoff. 😎
"The diver who collects specimens of underwater life has fun and becomes a keen underwater observer. .. seek slow-moving or attached organisms such as corals, starfish, or shelled creatures." (Golden Guide to Scuba Diving, 1968) :D

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