How in the hay does one determine the thread size on'm??

Need to change 2 out on the Ku'pon special Harbor Freight trailer I bought, but have no idea of the thread size. The ones that came with it, take grease like an ole man trying to "p" through a hole the size of a ......we'll you get the idea.

Help a brudda!

Remove one and go to tractor supply and match it up....if you can

Home Depot sells them. Take an old one to the store with you.

That option isn't available for us suburban dwellers.

http://www.harborfreight.com/50-piece-grease-fitting-assortment-67570.html

I only need 2 sir!

Think of it as a life time supply lol. You never know when you will need another one.

you can't remove it? Is that what you are saying?

Is a press fit zerk?

Either 1/8" or 1/4" . Roll the dice.

My dad knew Zerk

Yep, buy both, they don't cost much.

Or metric.

It's a threaded zerk on this tire combo: http://www.harborfreight.com/12-inch-spare-tire-and-rim-44144.html

Do you own a set of sockets?

brake grease?

Wait, you need a valve stem...

Lol, I know what you meant. Let me see if I can find what size they typically were. 1/8th NPT is too big for a hub most of the time.

or chinese and glued.

Harbor Freight

Wth is going on here?

No wonder grease won't go in, backpressure

I bet it is 1/8"-27 PTF

Lol

Lol...yeah add a hub, can't fine that one on their site.

Take it out and clean the crud out of it, stick it on a gun and try it. Also clean out the hole it goes into.

Aaxion