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Hexagon head screws — Product grades A and B
ISO4017 DIN933 bolts
This International Standard specifies the characteristics of hexagon head screws with threads from M1,6
up to and including M64, of product grade A for threads M1,6 to M24 and nominal lengths up to and
including 10 d or 150 mm,whichever is shorter, and product grade B for threads over M24 or nominal
lengths over 10 d or 150 mm, whichever is shorter.
NOTE: This type of product is the same as that covered by ISO 4014 DIN931 with the exception of
threading up to head and nominal length up to and including 200 mm as popular lengths.
2 Dimensions
3 Specifications and reference standards
| Material | Steel | Stainless steel | Non-ferrous metal | ||
| General Requirements International Standard | ISO 8992 | ||||
| Thread Tolerance | 6g | ||||
| International Standards | ISO 724, ISO 965-1 | ||||
Mechanical Properties class | d <3 mm: as agreed | d < 24 mm: A2-70, A4-70 | Specified In ISO 8839 | ||
| 3 mm < d < 39 mm:5.6, 8.8, 9.8, 10.9. | 24 mm <d < 39 mm:A2-50, A4-50 | ||||
| d>39mm:as agreed | d> 39 mm: as agreed | ||||
International Standards | d < 39 mm: ISO 898-1 | d < 39 mm: ISO 3506-1 | |||
| d <3 mm and d >39 mm: as agreed | d>39 mm: as agreed | ||||
Tolerances Product grade | For d < 24 mm and l < 10 d or 150 mmb: A | ||||
| For d . 24 mm or l . 10 d or 150 mmb: B | |||||
| International Standards | ISO 4759-1 | ||||