#19 Nordyne Orifice 661019
Nordyne orifice #19. Also known as drill size 0.1660.
Hex head is 7/16", length is 7/16", threads are 1/8-27 NPT.
Picture is for reference only. Hole size will vary on actual item.
Replaces part #660889, 660531, 1065514 and 10655140.