Matt,

You did order the wrong part, but not for the reason you think.  The "S"
suffix on the part is for "socket" as opposed to pin and both parts you're
showing in the image are socket type connectors.  However, the original
connector is alternate insert position W which would be an ordering part
number of MS-3106A-18-22SW.  The attached diagram from MIL-STD-1651 defines
the keying options available for this insert in the MIL-C-5015 connector
series.  The part that's confusing about the military connector part
numbering is that the "normal" key rotation is a blank suffix and it is
only added when you specify an alternate rotation.

The good news is that from a connector perspective these two rotations are
the same parts, just assembled differently.  The bad news is that what
Arrow shipped you appears to be an "E" class insert rather than the "A"
class insert you ordered (the hard plastic of the original connector is A
class and the soft rubber which provides an environmental seal is the E
class) and as far as I know the E class inserts are glued into the shell
during assembly.  You can try to break it free and reinstall it at the
correct rotation but I don't have experience with attempting that.

I don't know that a company like Arrow will have the alternate keyings as
they are much less common, but a value-add distributor like PEI-Genesis
should be able to get you the correct part.  PEI-Genesis actually purchases
the connector subassembly pieces from the manufacturer and assembles them
to order in the specified configuration.  Also note that you don't need to
be limited to Amphenol as you search for a connector, other companies such
as ITT Cannon, Glenair, and Aero-Electric all make intermateable parts
complying with this standard.

Chris

On Fri, Sep 22, 2023 at 1:36 AM Matt Huszagh via time-nuts <
time-nuts@lists.febo.com> wrote:

Matt,
Unfortunately you have one connector that is to true MIL-Specification
that is the Amphenol  female with the blue inserts in the shell. The
other is an older shell with the same pin configuration made by BENDIX
the black insert. There is an obvious difference as you show.
I originally thought at first glance that you could interchange the
inserts but that is not possible as the insert index is not the same.
Bendix is long extinct and the connector shell does not look as though
it is made to current MS-Specifications .
The easiest way to solve your issue since it only involves 3 wires LI,
L2 and a Neutral  is to change out the 3 pin Bendix male flange
connector on the chassis or wherever it is located with a new mating
Amphenol of the same Series.The dimensions on the hole patterns should
be approx the same. Check first!
In the Early Seventies I used to be an engineer in training with
ITT-Gremar/Canon. We only manufactured MS connectors from SMA to
specialty MS connectors and shells and all MS Manufactured shells and
inserts were interchangeable. This Bendix is a commercial version or has
mating inserts that were deliberately made to the manufacturers own
shell/ insert specifications a specialty part. They appear to be look
alike MS- Connectors  but will not mate .
I know this does not solve your problem, but provides a remedy.
Best wishes,
WjB
------ Original Message ------
From "Matt Huszagh via time-nuts" time-nuts@lists.febo.com
To "Discussion of precise time and frequency measurement"
time-nuts@lists.febo.com
Cc "Matt Huszagh" huszaghmatt@gmail.com
Date 9/21/2023 1:44:36 PM
Subject [time-nuts] HP 5065A power connector (Amphenol MS-3106A-18-22S)
change?