Hex. Head Bolt To Is:1363(Part-1):2023 (Iso 4016/2022) M20X115 Mm , Property Class 4 .8 With Hex. Nut To Is: 1363(Part-3): 2018(Iso 4034/2012), Property Class 4. [ Warranty Period: 30 M Onths After The Date Of Delivery ] ]