Standards and grades

DIN 931 (ISO 4014) bolt: part thread, dimensions and property classes

← Back to standards and grades

DIN 931 is the hex head bolt with a partial thread: a plain shank next to the head and the thread only at the end. It is chosen when the joint works in shear or when the plain shank has to bear in the hole of the part.

Its current equivalent is ISO 4014, with the same differences in across flats that separate DIN 933 from ISO 4017.

Available in property classes 8.8 and 10.9 and in long lengths, which is where it is used most. For large sizes or high quantities, ask for a quote.

Thread sizeDIN 931 across flatsISO 4014 across flats
M1017 mm16 mm
M1219 mm18 mm
M1422 mm21 mm
M2232 mm34 mm
All other sizesSameSame

Related articles (in Spanish)

DIN 931 vs DIN 933: rosca parcial o total, cuál pedir → Comprar tornillos DIN 931 en grandes cantidades: cómo pedir para pagar menos → Tornillos 8.8, 10.9 y 12.9: qué significan y cuál elegir →

Other standards and grades

DIN 933 (ISO 4017) bolt: full 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 →

Request a quote