spindle castle nut spec

ok, maybe a dumb ass question but here go's. looked everywhere online cant find the castle nut torque spec for the front spindle on a 97 chevy crew cab dually. just making sure i dont over tighten it. have done three already with "feeling" my way, but dont feel comfortable doing it again! dont need anymore bearing failures! thanks for any advice

I think if I remember right it is 12 foot pounds