MOWER TAG BLADE MTD YARD MAN GUTBORD FOR MOWER MODELS 42 17542 , 15.5/42 , 17/42 , 17. 5/42 , 20/42 , 20/42 AUTOMATIC , 547/42 , 742RL , BRONCO42 , COLT XP 42 , LX42 , LX42 KH , TB2042 , TB4216 , TB4220 , PONY42 , XT1 547/42 , YM20/42 , P170HZ-S , P220HZ-S , RTZ42 MODEL - TECHNICAL CHARACTERISTICS LENGTH 540 mm CENTRAL HOLE star 6 prong OUTER HOLE 10 mm CENTRAL HOLE INTERAXIS 76 mm CODE: 13271801 ORIGINAL CODE 742-04308 , 742-04312 , 942-04308 , 942-04312 SR