Troy Bilt Sickle Bar 12 Rivet Set A set of twelve flat head rivets 5 MM x 20 MM (approx. 3/16" Dia. x 3/4"" Long) Sickle Bar Mower Part # 1766761 alternate Part # 1768295 Fits Sickle Bar Mower Model #'s 34033, 34034, 34035, 34043, 34061, 34062, 34065, plus other model numbers