I think you are talking about the larger threads on the stem, the ones that hold it in the rim, right? The end of a valve stem is 7.7 mm X 32 tpi. You need a precision measuring device and a thread pitch gauge to really determine what you have. Mine is either 5/8 or 14 mm and pretty fine. You could probably take a 3 cornered file and repair the threads if you get it out of the rim. I have broken off a couple cutting brush and just replace them with 5/8 rubber ones because my tires are tubeless and I never intend to put fluid in them.
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Today's Featured Article - Using Your Tractor: Creating a Seed Bed - by Chris Pratt. When I bought my first old tractor, I had only one idea in mind. It wasn't the preservation of old iron since at that time, I was unaware that people even did this. It wasn't to show off my restoration skills (though I had tried my hand at a couple of old motorcycles in my teens and if I recall correctly, those old motorcycles were sold in boxes about one quarter finished). It wasn't to relive memories of Grampa, Dad or myself out on the back 40 nursing the Farmall pulling too many b
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