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Can anyone tell me what the proper name of these sockets are?

mreisner

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Jun 25, 2019
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North of Detroit
These are for the retaining rings on things like key switches light switches Etc on older cars. I have several sets of them but have no idea what to call them when I go to advertise them. Thanks.20260622_205450.jpg20260622_205450.jpg
 
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cgrutt

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Mar 4, 2016
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Spanner nut or prong socket. I have a set of Snap-on believe they call them Antenna Nut Sockets.
 
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KnurledNut

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Jan 28, 2011
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These are for the retaining rings on things like key switches light switches Etc on older cars. I have several sets of them but have no idea what to call them when I go to advertise them. Thanks.
Do those have a brand on them? Looks like the base is knurled? What drive size are they?
 

bwringer

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Jan 1, 2013
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10,321
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Indianapolis
I've mostly seen "spanner nut socket" or "spanner nut pin socket". Most of my encounters with these things are the larger versions used in motorcycle swingarms, steering stem bearings, engine mounts, etc.

For example:

Sometimes you just see something descriptive like "Suzuki four prong lock nut socket" or "4-pin 24mm lock nut socket".
 

Vinny

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Jul 14, 2011
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636
Location
Simi Valley, CA
The type on the bottom right I see all the time in aerospace, and we call them spanner sockets. Parts made to fit to them are usually high stress but low torque requirements, so a normal Allen head has too little material to survive the application.
 
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