3a thread class right-hand 3.7500" overall length 0.7495" bore diameter 16 thread quantity per inch chromium inner member surface treated shouldered ball type unf thread series
one central tang 0.375 in.nom lg by 0.250 in.w extending one side w/0.218 in.corner radius; max surface finish-all surfaces 100 microinches aa; shape:special oxide surface treated