Standards and grades

DIN 934 (ISO 4032) nut: classes 8, 10 and 12 and sizes

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DIN 934 is the standard hex nut. Its current equivalent is ISO 4032, with the same changes in across flats at M10, M12, M14 and M22 as on the bolts.

The nut class must match the bolt property class: class 8 for an 8.8 bolt, class 10 for 10.9 and class 12 for 12.9. A lower-class nut limits the strength of the whole joint.

Bolt property classDIN 934 / ISO 4032 nut class
8.88
10.910
12.912

Related articles (in Spanish)

Tuerca para tornillo 10.9 (y 8.8 o 12.9): qué clase lleva → Tuercas sobremedida para galvanizado en caliente: cómo funciona ISO 10684 →

Other standards and grades

DIN 933 (ISO 4017) bolt: full thread and property classes → DIN 931 (ISO 4014) bolt: part thread and property classes → DIN 125 (ISO 7089) plain washer and DIN 9021 wide washer → ISO 4017 (DIN 933): fully threaded bolt dimensions → ISO 4014: bolt dimensions and thread length → DIN 985 prevailing torque nut: sizes and ISO equivalent → DIN 6914 (EN 14399-4) bolt: HV system and dimensions → DIN 975 threaded rod and DIN 976-1 stud → DIN 912 (ISO 4762) socket head screw: sizes and classes → Property class 8.8 bolts: strength, marking and nut → Property class 10.9 bolts: strength, use and class 10 nut → Property class 12.9 bolts: maximum strength and precautions →

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