Grease fitting size

[TomC750]

My '41 Mercury is missing the grease fittings in both front and rear springs in the center of the spring. I cannot figure out what the thread is. It is slightly smaller than either 3/8-24 or 1/8 pipe thread. I have a good collection of grease fittings, but none are right.

[aussie merc]

with 1/8 pipe there are 2 they look the same but arent bsp /npt

[ford38v8]

Good to have the zerks yes, but don't use them. The original lubricant Ford used is no longer available, and anyway, it would squeeze out the sides before it could travel to the ends of the leaves where it is needed most.
Labor intensive, but if your springs are worn, best to dismantle them, deburr them where they rub against each other, load them up with fifth wheel grease, and reassemble them. Don't use grease, it will make a mess, not do what you need, and dry up being useless.

[TomC750]

Originally Posted by ford38v8

Good to have the zerks yes, but don't use them. The original lubricant Ford used is no longer available, and anyway, it would squeeze out the sides before it could travel to the ends of the leaves where it is needed most.
Labor intensive, but if your springs are worn, best to dismantle them, deburr them where they rub against each other, load them up with fifth wheel grease, and reassemble them. Don't use grease, it will make a mess, not do what you need, and dry up being useless.

I know enough not to use regular grease. When I posted the question some time ago a poster stated that an acceptable substitute was available at any parts store. I should have written it down, but didn't. And I am still hung up on fittings.

[Kube]

Alan is quite correct. I use STP oil treatment in a grease gun when servicing friend's cars. It has nearly the same consistency of the Ford lubricant but not the same ingredients.

[TomC750]

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My car rides quite well, and I don't expect that the springs are worn, but I would still like to lubricate if possible, but without fittings, I guess I can't.

[tubman]

Perhaps the fittings or even the spring bolt assemblies are available from some of the aftermarket suppliers? Sounds like something Fred at Southside Obsolete might have on one of his many shelves.

[TomC750]

Originally Posted by tubman

Perhaps the fittings or even the spring bolt assemblies are available from some of the aftermarket suppliers? Sounds like something Fred at Southside Obsolete might have on one of his many shelves.

Thanks Tubman

[TomC750]

Well, I don't know why I didn't think of it before, but I looked in the "Green Bible" hardware section. The front spring fitting is 353040-AS7, 5/16-24 thread. The rear is 353041-AS7, 3/8-24 thread. Strange that there are two different threads front and rear. At least now I know what I am looking for.