[MRCA] U-229/U O-Rings: The Solution

[Radio Station KW1I]

Al,

Does this mean you will have some spare units for .10 ea plus S & H?

Dale

----- Original Message ----- 
From: "Al Klase" <al at ar88.net>
To: "Military Radio Collectors Association" <mrca at mailman.qth.net>; 
<milsurplus at mailman.qth.net>
Sent: Monday, November 05, 2007 3:32 PM
Subject: [MRCA] U-229/U O-Rings: The Solution


> Here's the outcome of the U-229/U O-ring caper:
>
> I'd ordered a batch of 1/16" x 5/8" ID rings only
> to find out they're too fat. 1/16 rings are
> nominally 0.070" in cross section.
>
> After my initial post Robert Downs reported that
> the National Stock Number for the ring is
> 5330-00-905-6032.
>
> Another member with access to FedLog reported in a
> private email that the description of the part is:
>
> MRC Requirement Statement Clear Text Reply
> NAME ITEM NAME O-RING
> ADVN CROSS-SECTIONAL HEIGHT 0.055 INCHES MINIMUM AND
> 0.061 INCHES MAXIMUM
> ADYT CENTER HOLE DIAMETER 0.605 INCHES MINIMUM AND
> 0.615 INCHES MAXIMUM
> MATT MATERIAL RUBBER CHLOROPRENE CLASS CR
>
> That translates perfectly into 1.5 mm by 15.5 mm
> ID. Chloroprene is generic Neoprene.
>
> I was unable to find these rings in Neoprene, but
> McMaster Carr (www.mcmaster.com) had them in plain
> old BUNA-N, part number 9262 K636. Cost was
> $10.10 for 100 shipped.
>
> These work great.  I dunked them in Liquid Wrench
> Silicone Spray before installation. The connectors
> now go on easily and even suck a vacuum when you
> pull them off.
>
> Thanks for the group effort.
>
> Regards,
> Al
>
> -- 
> Al Klase – N3FRQ
> Flemington, NJ
> http://www.skywaves.ar88.net/
>
>
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