New item 10/22/17! Mower drive belt adjusting screw for all H-N40,44,45 and 46 model 38-48" LH and rear discharge decks used on '71-'88 model year tractors. Also used on all 60" mower decks including the J-M48 LH decks as well as the RM60 RH discharge decks used on the 1989 and newer 4000/4100 series tractors. Used with companion p/n C14269 nut. Replaces J I Case p/n C16562.