ISO 898 defines the mechanical property classes stamped on bolts, screws, and nuts (e.g. 4.6, 8.8, 10.9) — the reference standard behind the grade markings used across our entire bolt and nut range.
- Steel Grades
- 4.6, 4.8, 5.6, 5.8, 8.8, 9.8, 10.9, 12.9