We are offering hub bolts. Application: they are mounted to the automobile hubs that secure the wheels with wheel nuts sizes: as per the application or customer requirement thread: i.s.o. Metric (fine & rough), unf unc material: en 8aisi 1035, en 8daisi 1045, en 15aisi 1541, en 18 aisi 514037cr4, en 19aisi 4140 42cr4mo2 i.s.o. Material strength grade: 6. 8, 8. 8, 10.9, 12.9 sae material strength grade: 2, 5,