there were lots of these

[bgarrett]

I only got two so you guys could have fun guessing  :)
1/2" drive, screw thread, 6 1/2" total length
numbers appear to be hand written in ink
3
3285
on the flat

[JoeCB]

stems for some sort of shut off valve. Packing gland around the shaft and an angled point to fit a seat.

Joe B

[EVILDR235]

Cylinder head guide studs for motors with no dowel pins ? I have something simular to yours and thats what mine are used for.

EvilDr235

[bgarrett]

Dr evils guess is interesting. The threaded part is 1" and the shaft is about 3/4" so if you screwed these in and slid a head on,  you couldnt get these  out.  NEXT!  :)
There are 8 threads per inch and the guy had a bushel basket with many in it. He lived in the country and had a tractor and bush hog but no other signs of a hobby

[lazyassforge]

They are wellhead lock pins. We used to make them at the machine shop I work at.

Hope this helps!

Bill D

[bgarrett]

Hooray!  tool talk comes thru once again

[JoeCB]

"stems for some sort of shut off valve. Packing gland around the shaft and an angled point to fit a seat."...

wow! I was close

Joe B