These were in a parts bin and other than one is 1/2-28 and the other is 5/8-24 I know nothing about them.
The one marked 1/2-28 3102 looks like it was a pin and weld, the internal threads look and work fine.
$90 for the pair shipped.
The one marked 1/2-28 3102 looks like it was a pin and weld, the internal threads look and work fine.
$90 for the pair shipped.