Standards and grades

DIN 933 (ISO 4017) bolt: full thread, dimensions and property classes

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DIN 933 is the hex head bolt threaded along the whole length of the shank. It is the most common reference in industrial metric fasteners when the part is tightened directly onto a thread or with a nut and no plain shank is needed.

Its current equivalent is ISO 4017. The bolt geometry is the same, but in some sizes the across flats of the head changes, so the spanner that fits one does not always fit the other.

We supply it in property classes 8.8 and 10.9, in zinc plated, black or hot-dip galvanised steel depending on the size. If you cannot find a size in the catalogue, ask for a quote: we work to order with factory lead times.

Thread sizeDIN 933 across flatsISO 4017 across flats
M1017 mm16 mm
M1219 mm18 mm
M1422 mm21 mm
M2232 mm34 mm
All other sizesSameSame

Related articles (in Spanish)

DIN 933 e ISO 4017: equivalencias y diferencias reales → DIN 931 vs DIN 933: rosca parcial o total, cuál pedir → Pares de apriete de tornillos: tabla métrica 8.8 y 10.9 →

Other standards and grades

DIN 931 (ISO 4014) bolt: part thread and property classes → DIN 934 (ISO 4032) nut: classes 8, 10 and 12 and sizes → 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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