Hexagonal Head Screw Bolt with Washer Compatible with For John Deere Models : F620, F680, F687 ZTrak 48" 54" 60" Q820M Quik-Trak Stand-On 48" Z510A Estate ZTrak 48" SV715 Estate ZTrak 48" Z710A ZTrak Mower 48" Z810A Professional ZTrak 48" Z820A Professional ZTrak 48" Z920M ZTrak M Series Mower 48" ( SN: - 090000) ( SN: (090001 - ) Z915E ZTrak E Series Mower 48" (SN: - 120000) (SN: 120001 - ) 647 Quik-Trak Mower 717 Mini-Frame ZTrak (Worldwide Edition) 717A Mini-Frame ZTrak (Worldwide Edition) 7G18 Commercial Walk-Behind Mower 7H17 Commercial Walk-Behind Mowers Z540R ZTrak Mower Z545R ZTrak Mower Z645 EZtrak Mower (Worldwide Edition) Z720E Mid-Duty ZTrak Mower Z735M Mid-Duty ZTrak Mower Z910A ZTrak Pro Series Mower Z915B ZTrak B Series Mower Z920A ZTrak Pro Series Mower Z920R ZTrak R Series Mower Order Includes : 3 x Bolt with Washers: 19M7489, M123520, M123522 Bolt Length : 55 mm - 2.16 in M16-2.0 Washer inner Diameter : 15.96 mm - 0.62 in Washer Outer Diameter : 63.8 mm - 2.51 in