Does anyone know what size the castle nut is that threads onto the ball joint that fits into the steering arm on the left side of the axle (facing forward) on an L295DT? As it turns out the cotter pin sheared and (unbeknownst to me) the nut had been working its way loose until I lost it yesterday while moving the tractor. I'm assuming I can pick one up from NAPA, etc...as long as I know the size and thread.