Regarding Honeywell part numbers 192-303KET-A01 and 192-303KET-A02, please see below product managers response to the difference:
The A01 and A02 call out the diameter of the thermistor. A01 is 0.095” and the A02 is 0.075”
Summary
480-5583-ND
192-303KET-A02-ND
192303KETA02
480-5583
480-3162-ND
192303KETA01
480-3162