0.4900" first hole diameter 3.7470" overall length surface finish 30 microinches min, 25 microinches max; hole 0.4990 in. go, 0.5000 in. no go 17a split, plain, no outside flanges
3a thread class right-hand 0.3590" thread length 1.2030" overall length 24 thread quantity per inch chromium outer ring surface treated cam follower unjf thread series