
6 - MAINTENANCE
Inch lock nuts, all metal (three optional
methods)
20090268
4
Grade identification
Grad-
e
Corner marking
method (1)
Flats marking
method (2)
Clock
marking
method (3)
Grad-
e A
No notches
No mark
No marks
Grad-
e B
One
circumferential
notch
Letter B
Three marks
Grad-
e C
Two
circumferential
notches
Letter C
Six marks
6-7
Содержание 905GBL
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