Help identify joint pin?

[Mensabum]

I am curious if anyone here can identify this joint pin?

I have no idea what type of shaft would be compatible with it.

Thanks a lot.

Looks like a 5/16-18 with no pilot.

 

[vintagecollectibles831]

Zoom out and place a ruler beside the joint pin. Count the amount of threads in an inch. If you have a set of calipers and can tell us the O.D and an aproximate minor that helps a lot.
Often it helps a lot just by telling us what brand/maker this cue is.

Hi, can you tell me how to use a digital caliper to do those measurements? I have no idea what any of that stuff means. I only know MM and Inches, lol. Thanks a lot.

 

[vintagecollectibles831]

you need to use calipers to measure the thread pitch. a photo of the joint pin next to a ruler may be more helpful for a member here to identify.

Hi, can you tell me how to measure the thread pitch, using a regular digital caliper? Lol, I feel like such an idiot. Thanks a lot.

And, I believe I counted 11 threads per inch. Thanks again.

 

[skor]

Hi, can you tell me how to measure the thread pitch, using a regular digital caliper? Lol, I feel like such an idiot. Thanks a lot.

And, I believe I counted 11 threads per inch. Thanks again.

Looks like 3/8x11