Source for plastic SAE -3 and -4 LP HP port plugs?

[Fibonacci]

Just wondering if anyone has a source for those plastic threaded port plugs that fit LP SAE-3 and HP SAE-4 ORB ports?
Very handy to plug spare first stage regs and much easier to remove/replace than the usual unthreaded tapered plastic plugs, and actual port plugs are not required in storage. Some new first stage regs are shipped this way.
I can find some industrial supply places that list them, but only in 1,000 minimum order quantities

 

[grf88]

...

 

[SlugLife]

I'm not quite sure I follow the reasoning why you want plastic. Theoretically, anything with the right threading should fit.

If it's just price-related, at $2 each, I tend to just buy a bunch of port plugs from DGX.

Regulator Port Plugs

Replacement Port Plugs for SCUBA Regulators

www.divegearexpress.com

 

[Fibonacci]

Just to act as dust plugs, without having to use up actual port plugs.
The DGX plugs look good but shipping to Australia would make them significantly more expensive... locally they run around $3.50 each x 4-6 but if I can get plastic dust caps for a few cents each I'd rather put the real port plugs on 'user' regs.

 

[SlugLife]

Plastic caps may be cheaper, but one option (if you can't find them) is to try a local hardware store. You should be able to find bolts with the right threading. They usually have something like this (below). I'd probably use a port-plug or hose (not the first stage) to match.

 

[Luis H]

If all you want is a dust plug, you could probably just use plastic or metal short screw.

The LP uses just standard 3/8"-24 UNF-2B threads.

The HP uses 7/16" 20 UNF-2B threads.

They are both very common in the US. I do not know about Australia.

The Screw length should probably be 3/8" or less for either.

 

[Fibonacci]

Thanks Luis, sadly those UNF thread sizes are very uncommon outside SCUBA in Australia.
I have since had some success in tracking down SAE -4 caps (7/16"x20 HP port) as they are used in hydraulic equipment here, but the smaller SAE -3 (3/8"x24 LP port) still eludes me.
I've emailed Ryco to ask

JPD - Plug Suits Female JIC, SAE & UNO

Part Numbers: JPD-07 JPD-08 JPD-09 JPD-10 JPD-12 JPD-14 JPD-17 JPD-19 JPD-21 JPD-26

www.ryco.com.au

 

[broncobowsher]

For just a dust cover, CapPlug comes in a ton of sizes. We use them at work to keep dust out of open ports on equipment. Non-threaded. Taper fit.

After awhile most divers will end up with a pretty good assortment of random port plugs.

 

[Fibonacci]

Aha... these?

Plastic Threaded Plugs for SAE O-Ring Ports | PDO Series | Caplugs

PDO Series Threaded Plugs are designed to provide a positive seal for SAE straight threaded O-ring type ports and bosses on fluid power components.

www.caplugs.com

Smallest size is 7/16"x20 SAE-4

Tapered Caps and Plugs | T Series | Caplugs

T Series is designed to be used as a cap or plug. The caps/plugs are tapered to fit a wide range of applications to protect parts from dirt and debris.

www.caplugs.com

I emailed to ask correct size tapered plugs for SAE-3 and -4

 

[broncobowsher]

Didn't know they made so many versions. But yes, those are simple dust plugs.