28 MM Hub Nut for Balancer Shaft with 8 MM Thread Pitch 
Fits the following wheel balancer brands:
ACCUTURN - 5100, 5223, 5500, 5600 (Serial #51-0001 To 51-0622)
COATS - 600, 650 , 700, 800, 825, 850, 925, 950, 1000, 1025, 1050, 1055, 1250.If it has the original shaft.
Interchangeable Part Numbers:
 
COATS Part #: 110543, HN110543, 8110543, HN-110543
Made in the U.S.A.