"Less" operator behaving like "Less or equal"

I'm probably missing something really obvious, but I'm having an issue with this bit of code:

  if (hit.transform.tag == "Interactable" && hit.rigidbody.mass < maxPickupWeight)
 {
         PickUpObject(hit.transform.gameObject);
 }

My maxPickupWeight is set to 1000f, but I'm still able to pick up objects with a mass of 1000. If I set it to 1001, then I can't pick it up. It seems like the "<" operator is behaving like "<=". Shouldn't I only be able to pick up objects with a mass of 999 or less?

Obviously the simple solution is just to set the mass of objects I don't want the player to pick up to 1001, but I'd rather figure out what's wrong here.