Farmall Super C ?

[Soundguy]

as I seem to have bought an almost lifetime supply when our local Farm & Fleet sold out, and had the D15Y's on sale for like 59 cents ea.
...

same here. our tsc sold out of champs. i bought the display box on hte wall. actually... got the metal display for free by buying all the plugs left in it. and yeah.. they were cheap like 50-or maybee 59 cents each.

I got a lifetime supply too.. for most of my machines. and some stuff i don't even own.

i'll be that old guy at tractor shows with a ton of NOS plugs one day...

 

[mcfarmall]

I bought a deep well socket 1/2" drive that fits the plugs and then turned the OD of the socket down in a lathe. There is very little room for a socket on those plugs and it will bind up in recess of the engine block. Just toss it in the tool box of the tractor so it's always handy!

 

[DJ54]

A 3/8" drive deep well fits fine, with no binding.