This is a A-8.2.2.00515 Nut, Castle (24 MM X 2MM) PN: 8.2.2.00515Main Description As Following : A-8.2.2.00515 Nut, Castle (24 MM X 2MM) P.N: 8.2.2.00515 New Castle nut, 24 mm x 2 mm. Replaces Comer No. 8.2.2.00515. Fits Comber gearboxes.Replaces: Comer Part No: 8.2.2.00515 Crossed From: SW05506 , Found in Section & Models : Driveline > Gear Box Components, Comer Several: Gear Box Associated Items : New Also This is An Aftermarket Product And : New Castle nut, 24 mm x 2 mm. Replaces Comer No. 8.2.2.00515. Fits Comber gearboxes. Replaces: Comer Part No: 8.2.2.00515