Genuine Mazda replacement hub nut. This measures 32mm across flats (32mm socket to remove) It fits the rear hubs of NB 1998-2004*
*Mazda did change the size of the rear driveshaft so check - you may need the 29mm nut
A hub nut should not be reused. This holds your whole wheel on and replacing it is good insurance. If you are replacing a wheel bearing, make sure to order a new hub nut