The use of a harder grade bolt will void the warranty

4300 COMPACT TRACTOR

New Heavy Duty Corded Drive Belt

555C Indust/Const

548D Skidder

20 Sickle Sections and Bolts Compatible with Massey Ferguson Mower Conditioner 31 32 41 42 51 52 71 72 135 CAT The use of a harderWide Compatibility: 20 Sickle Sections and Bolts compatible with Massey Ferguson Mower Conditioner models 31 32 41 42 51 52 71 72 135 Specific Diameter Requirement: These sections are designed for models that use 7 32" diameter only. If your model uses 1 4" diameter, these will not work Complete Bolt Kit Included: Comes with comprehensive bolt kit including (50) 5 8", (5) 1" and (5) 1 1 4" Long Bolts with Locknuts for secure installation Rivet to Bolt