Going through some parts and found these temp sensors and coolant nipple.The one on the left has a plastic top and AC258 M on it. The middle one has 12v and AC on it. Any ideas as to the application? The other is a coolant/heater nipple, never noticed until I cleaned it up that it had 7.0gpm and F31 on it. Again, any specific application? I got them in a parts lot 20+ years ago. Thanks for any info!
