1)The full-stop in the marking symbol
may be omitted. 2)When low carbon martensitic steels are
used for property class 10.9 the symbol 10.9 shall
be underlined: 10.9
Identification with the manufacturer's mark and
the property class is mandatory for hexagon screws
3.6 to 12.9 and socket head cap screws 8.8 to 12.9
with thread diameter d> 5mm, where the shape
of the screw always allows it - preferably on the
head.
Examples of markings on hexagon screws.
Examples of markings on socket head cap screws.
Marking Of Nuts
(According to ISO 898 - Part II)
Property Class
04
05
4
5
6
8
9
10
12
Either designation Symbol
04
05
4
5
6
8
9
10
12
Code (Clock Symbol) Symbol
Identification with the manufacturer's mark and
property class is mandatory for hexagon nuts with
thread diameter d > 5 mm. The hexagon
nuts must be marked with an indentation on the bearing
surface or on the side or by embossing on the chamfer.
embossed markings must not protrude beyond the bearing
surface of the nut.
Catalogue
