We think the one on the right is an electrical temperature sensor. It has a short threaded post on the far end. If it is a sensor, then there should be some insulating material between the post and the body, but some exploratory scraping revealed only brass.So maybe it's just a hunk of brass with a threaded post.
The other one we suspect is a bleed screw. My question is why go to the trouble to add the little pipe outlet? Why not just drill the hole and leave it at that? These things are from a different age.
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