antenae
Beard, hair, feeler, whiskers, cilium, vibrissa...
palp
触手 Shokushu
A tentacle is a flexible organ found in animals, particularly invertebrates. Some synonyms for the word 'tentacle' include appendage, arm, limb, and feeler.
feeler gauge
Insect's feeler is a 'palp'
The likely word is "antenna" (an insect feeler, or a broadcast aerial).
0.03mm is the least count for feeler gauge
The likely word is antennas (antennae), the plural of antenna, a bug's feeler or a mast for receiving signals.
a feeler guage cannot be calibrated, it is made at precise measurements that cannot be changed. When a feeler guage is out of spec, it is replaced.
card dealer, tealer (color more teal than another), old healer, ant feeler, ...
A kiddie feeler is apparently a person who enjoys feeling and doing inappropriate things with children.