About nuts DIN 934 8 | | and IS0 40328 level and the difference between a definition
DIN 934: DIN 934 is a dimension standard for nuts. It is the original German standard. If you want to check whether the mechanical properties of nuts are qualified, you should consult THE DIN267-4 standard, which specifies the inspection method and test data of nuts. The load retention of the nut is constant, which is 400MPa, 500MPa, 600MPa, 800MPa, 1000MPa and 1200MPa respectively. IS0 4032: However, with the progress of science and the improvement of people's quality awareness, it is found that the provisions of this standard bring great hidden trouble to quality safety. Because people always hope that in the process of bolts and nuts to cooperate, if quality accidents occur, they are always eager to bolt failure first, to be safe so that we can see if the nut fails, this is sudden accidents, so the European Union and the revised ISO international organization, create new standard IS0 4032 standards. The thickness of this standard has increased, so the test standard is used IS0898-2. This mechanical performance standard stipulates that the load retention of nuts increases with the increase of specifications, such as grade 8 nut gradually increased from 840MPa to 920MPa.
It was intended to delete from DIN267-4 the previous specification for the strength classes of rough-toothed nuts and replace it with DIN ISO 898-2. However, because the latter standard not only has a higher guaranteed load, but also changes in thickness, and also takes into account the prior and will not be abolished in the short term DIN934 and the numerous technical documents and drawings available, DIN 267-4 needs to be retained, but must be distinguished from DIN IS0 898-2. So in DIN267-4 inspection standard to the nut performance rating standard tag and two vertical lines, such as I8l, in order to prevent confusion.
