is 1-5/8 long 8 required per wheel ford www.steiner tr actor.com sales@steiner ... rear axle shaft outer oil seal pair w sheet metal retainers fits 8n up to sn 486752 ... replaces #a8nn4248a 2 used per tractor sold in pairs 3 lbs rear axle shaft ... 1965 up replaces #c5nn4115b 4 used per tractor sold individually 1 lb gaskets abc194 $ ... 2-3/16 o.d x 1-15/16 i.d 2 used per tractor sold individually .25 lb rear axle ... 4-3/8 o.d x 3-3/4 i.d 2 used per tractor sold individually .25 lb fds428 $4.95 ...