Identification Notch  | Numeral  | Specification  | |
|---|---|---|---|
Metric  | English  | ||
None  | 1  | 1.880-1.981 mm  | 0.074-0.078 in  | 
On the side of 1 tab  | 2  | 2.083-2.184 mm  | 0.082-0.086 in  | 
On the side of 2 tabs  | 3  | 2.286-2.388 mm  | 0.090-0.094 in  | 
On the end of 1 tab  | 4  | 2.489-2.591 mm  | 0.098-0.102 in  | 
On the end of 2 tabs  | 5  | 2.692-2.794 mm  | 0.106-0.110 in  | 
On the end of 3 tabs  | 6  | 2.896-2.997 mm  | 0.114-0.118 in  |