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Inch Lock Nuts, All Metal (Three optional methods)
Grade Identification
Grade
Corner Marking Method (1)
Grade A
No Notches
Grade B
One Circumferential Notch
Grade C
Two Circumferential Notches
INTRODUCTION
4
20090268
Flats Marking Method (2)
No Mark
Letter B
Letter C
47835583A 15/02/2017
22
Clock Marking Method (3)
No Marks
Three Marks
Six Marks
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