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Discussion of diving methods and equipment available prior to the development of BCDs beyond the horse collar. This forum is dedicated to the pre-1970 diving.
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ScubaLawyer
Master Diver
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First Name: Mark
Location: Laguna Beach, CA

Reducer bushing sourcing question

Mon Jul 15, 2019 8:43 pm

I know the subject has been discussed before on here but i can't find the discussion so I'm asking again.

I'm replacing the reducing bushings on my old USN 1800 psi 38's. I have a NOS 1/2" tapered manifold I'm going to install.

I know McMaster-Carr sells the 1 3/8" bushings (at least that is the socket size) but I can't seem to find the correct M-C catalog number to order them.

I recall someone on here supplied that catalog number a while back. Would you be so kind as to provide it again?

Thanks,

Mark
"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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captain
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Re: Reducer bushing sourcing question

Tue Jul 16, 2019 10:11 am

Captain

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ScubaLawyer
Master Diver
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First Name: Mark
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Re: Reducer bushing sourcing question

Tue Jul 16, 2019 11:06 am

Thanks Capt. Tom!

Assuming my 1941 dated tanks pass hydro I'll be posting pics of my rebuild. Mark
"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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SurfLung
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First Name: Eben
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Re: Reducer bushing sourcing question

Tue Jul 16, 2019 11:32 am

Another Choice...
- I didn't like the stainless bushing because it is just too long and sticks too far out from the end of the tank. McMaster has other versions. I found (in my emails) that I ordered a few different ones (some galvanized) and settled on a black steel "High Pressure Steel" fitting. I think this is as close to the original bushings in material and length. Its rated to 3000 psi... Which is the 5/3rds Hydro pressure I should never even come close to with my 1800 psi Twin 38s. So these are what I've put on the latest Twin 38 projects. Here's the link:

https://www.mcmaster.com/4513k348

Here's a photo with the Stainless Reducer I think is too long. Might not be the same as Captains link...
Image
- I am re-doing this tank after being convinced the wire wrap (USN ShatterProof) had to come off. Sure enough a little corrosion had started where the wrap was trapping moisture. I'll be using the black steel fitting instead of stainless and protecting the exterior with Galvalite paint.
SurfLung
The Freedom and Simplicity of Vintage Equipment and
Vintage Diving Technique are Why I Got Back Into Diving.

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ScubaLawyer
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First Name: Mark
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Re: Reducer bushing sourcing question

Tue Jul 16, 2019 1:52 pm

Thanks Eben. I'll check those out too.

M
"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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ScubaLawyer
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First Name: Mark
Location: Laguna Beach, CA

Re: Reducer bushing sourcing question

Tue Jul 23, 2019 5:00 pm

Couldn't decide as between Captain and Eben's suggestions so I got both cause they're cheap. (The bushings. Not Captain or Eben :) )

Jumping the gun a tad as hydro is this week on the 38's. Fingers crossed!

M

Image
"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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ScubaLawyer
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First Name: Mark
Location: Laguna Beach, CA

Re: Reducer bushing sourcing question

Mon Aug 12, 2019 11:32 am

ScubaLawyer wrote:
Tue Jul 16, 2019 11:06 am
Thanks Capt. Tom!

Assuming my 1941 dated tanks pass hydro I'll be posting pics of my rebuild. Mark
UPDATE. One tank with an initial hydro date of 10/1941 passed hydro no problem. The other tank with an initial hydro date of 10/1942 failed hydro. The guy that does my hydros is very vintage savvy and he was really bummed it didn't pass. If it would be possible for it to pass he would have done so. Currently looking around for an equivalent round-bottom USN 1800 psi ALFCO tank. I have the NOS 1/2" npt tapered manifold, new reducer bushings, new burst discs and bands but just one lonely 38 cu ft tank. Hate to sink any more $ and time into this project but I'm a glutton for punishment. If anyone gets a line on a replacement tank kindly let me know. Haven't decided yet between going forward and just abandoning the project. Such is life. :) Thanks. Mark
"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

SnarkIII
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Re: Reducer bushing sourcing question

Tue Aug 13, 2019 10:45 am

Mark PM sent

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