Ice-o-matic parts manual 17.0 gc series-gc300 gc550 air and water cooled -- page 2 -- iten code 501
A direct expansion refrigerating cooling element where the liquid refrigerant boils or evaporates and absorbs heat.
NSN 5985-01-081-4498
NSN 5999-01-575-4512
NSN 6110-00-967-2071
NSN 5945-00-905-8976
NSN 5950-01-258-0012
NSN 5895-01-421-6873
NSN 5985-01-422-9812
NSN 5905-00-788-1430
NSN 6650-01-069-8211
NSN 6645-00-137-7699
NSN 6105-00-470-0441
NSN 7035-01-473-0517