AA Durable cast metal hub nut for tire balancer shafts, designed to fit 28mm shafts with an 8mm thread pitch. Compatible with wheel balancers from Accuturn (5100, 5223, 5500, 5600) and Coats (600, 650, 700, 800, 825, 850, 925, 950, 1000, 1025, 1050, 1055, 1250) with original shafts. Ideal for tire shops and auto service centers looking for reliable balancer accessories.