Requires reuse of existing flat washer on tractor mower deck mandrels.  For nut with built-in washer, use #596134801.
Replaces AYP #(s) 137266, 139729; Husqvarna #(s) 532 13 72-66, 532 13 97-29, 539107590.
                        
                        
•OD: 1/4"
•Thickness: 3/4"
•Thread: 9/16"-18
•Weight: 0.15 lbs