Cap for air bed?

[beers.jo...@gmail.com]

Any suggestions for a replacement cap to hold air in an REI "Relax Queen Air Bed"? REI doesn't have any parts - the mattress is at least 7 years old. The plastic plumbing caps at Ace Hardware on Willy St. have the wrong thread pitch, even though a 3/4 inch diameter cap was roughly the same size as the threaded hole.

I searched the web (Ebay, etc.) without any luck.

A 1" twist-turn drain plug at Ace worked, but having a brass piece extending above the mattress seems less than ideal.

Here's a link to e photos, including the drain plug:

https://photos.app.goo.gl/ETx1xz6bNzb1Zn4U7

As always, thanks for any help.

[Chris Meyer]

Have you tried one of the generic ones online?

https://amzn.to/4nxaR39

Do you remember if it had an o-ring/face seal?  It's unclear from your picture if the front of the bung is flat/grooved/where the seal is being made.

Chris

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[beers.jo...@gmail.com]

Thanks, Chris. The generic ones online turned out to be a bit too small at a diameter of 22mm. About 24mm might be the right diameter? The bung hole in the mattress has a flat seal, and the threads start immediately below that.

I never saw the original cap - the mattress was given to a child by a grandparent. The donor didn't know that the cap was missing.

I hate to discard an otherwise useable mattress, so maybe I'll make a removeable cover for the twist-type drain plug to prevent the brass handle from poking the person sleeping. Or, buy a drain plug with a handle that snaps, rather than twists:

 https://www.amazon.com/Attwood-Brass-Plated-Handle-Snap-Handle/dp/B0000AYEIY/ref=pd_bxgy_d_sccl_1/131-8433140-8893555?pd_rd_w=YJD0t&content-id=amzn1.sym.de9a1315-b9df-4c24-863c-7afcb2e4cc0a&pf_rd_p=de9a1315-b9df-4c24-863c-7afcb2e4cc0a&pf_rd_r=PRP1HFQPFW0FWKR75289&pd_rd_wg=lky3z&pd_rd_r=9dd691a3-bb61-4502-9346-7e47dcef0b3b&pd_rd_i=B0000AYEIY&th=1&psc=1

As always, I appreciate the suggestions.

Jon