| Inch | Figure | I.C.250"and over | I.C.under 250" |
|---|---|---|
 |
A | D |
 |
M | P |
 |
G | K |
 |
N | E |
 |
R | S |
 |
F | L |
| Special Design | X | X |
| Metric | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Symbol | Hole | Hole Configuration |
Chip Breakers |
Figure | Symbol | Hole | Hole Configuration |
Chip Breakers |
Figure |
| W | With Hole | Cylindrical Hole + One Countersink (40~60°) | No |  |
A | With Hole | Cylindrical Hole | No |  |
| T | With Hole | One Sided |  |
M | With Hole | Cylindrical Hole | One Sided |  |
|
| Q | With Hole | Cylindrical Hole + Double Countersink (40~60°) | No |  |
G | With Hole | Cylindrical Hole | Double Sided |  |
| U | With Hole | Double Sided |  |
N | Without Hole | - | No |  |
|
| B | With Hole | Cylindrical Hole + One Countersink (70~90°) | No |  |
R | Without Hole | - | One Sided |  |
| H | With Hole | One Sided |  |
F | Without Hole | - | Double Sided |  |
|
| C | With Hole | Cylindrical Hole + Double Countersink (70~90°) | No |  |
X | - | - | - | Special Design |
| J | With Hole | Double Sided |  |
||||||