Class 8 nuts — ISO 898-2

• Material: carbon or alloy steel, heat treated
• Proof load: 800 MPa (M5 to M39)
• Hardness: HV 200–302 / HRB 93.5–HRC 32 / HB 190–286
• Compatible with 8.8, 9.8 and 10.9 class screws/bolts

Indicative loads by diameter

• M12: 63.1 kN
• M16: 116 kN
• M20: 183 kN
• M24: 265 kN
• M30: 421 kN

Available surface treatments

• Electroplated zinc coating (ISO 4042) — 5 to 12 μm
• Hot dip galvanizing (ISO 10684) — 40 to 60 μm — ⚠️ retapping required
• Phosphating + oiling (ISO 9717) — indoor use

For any item not listed in the shop, please contact us.