measures: diameter: 5/8 inch = 16mm hole: 40 threads per inch =.123" = 3.12mm width: 3mm
USA & International Customers: Please contact me if you would like a specific type of shipping before purchase so the listing can be corrected. Thank youmeasure 5/8 inch for screw back collar insignia or hat emblems. Fits most Large screw back hat insignia from WWII to present. The textured edge allows for a better grip. The large nut is also easier to work with for those who may have long nails, large fingers or unsteady hands.
This listing is for one lot of 2 nuts, the outer nut size makes no difference when it comes to the collar insignia. Just the thread size.