| Size | Head O/D |
| 0BA x 1/2" (M6) | 3/8" |
| 0BA x 3/4" (M6) with 1/4" Plain Shank | 3/8" |
| 0BA x 1" (M6) with 3/8" Plain Shank | 3/8" |
| 2BA x 1/2" | 5/16" |
| 2BA x 1" 2BA x 1 1/2" (3/4" Plain Shank) | 5/16" 5/16" |
| 4BA x 3/8" 4BA x 1/2" 4BA x 5/8" | 1/4" 1/4" 1/4" |
| 5BA x 1/2" | 7/32" |
| 5BA x 1" | 7/32" |
| 6BA x 1/4" 6BA x 1/2" | 3/16" 3/16" |
| 6BA x 1" | 3/16" |
| 7BA x 1/2" | 0.170" |
| 7BA x 1" | 0.170" |
| 8BA x 1/4" | 5/32" |
| 8BA x 1/2" | 5/32" |
| 10BA x 1/2" | 7/64" |