Nordyne orifice #37. Also known as drill size 0.1040.
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.
We have a large selection of Furnace Parts Manuals online to help you look up your part number by model number. Click on Furnace Parts Manuals then use Control and F to search your model number. ctrl+F
1 Year Warranty on ALL parts!