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From: Roger Hayter <roger@hayter.org>
Newsgroups: sci.electronics.repair
Subject: Re: Re (2): Schrader connectors for medical air and nitrogen.
Date: 29 May 2024 18:11:57 GMT
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On 29 May 2024 at 18:56:33 BST, "peter@easthope.ca" <peter@easthope.ca> wrote:

> In article <v2qo44$2f14t$1@news.eternal-september.org>, ehsjr
> <ehsjr@verizon.net> wrote:
>> The only difference I can see is the SH-12 is for nitrogen, the
>> SH-16 is for air.
> 
> Understood.  One is marked "Air" and the other "N2".
> 
> A few microns or thousands of an inch can block interchangeability.
> Obvious when fitting parts; not in photographs. Fitting a UNC nut to a
> UNF screw is a more extreme example.
> 
> Thx,                    ... P.

One reason for labelling them and keeping them separate is that the oxygen one
has to be kept free of inflammable lubricants etc.

-- 

Roger Hayter