Machinery's Handbook Pocket Companion

| Nominal Key or Bit Size | Cap Screws 1960 Series | Flat Counter sunk Head Cap Screws | Button Head Cap Screws | Shoulder Screws | Set Screws | |
|---|---|---|---|---|---|---|
| Nominal Screw Sizes | ||||||
| HEXAGON KEYS AND BITS | ||||||
| 0.028 |
|
|
|
| 0 | |
| 0.035 |
| 0 | 0 |
| 1 & 2 | |
| 0.050 | 0 | 1 & 2 | 1 & 2 |
| 3 & 4 | |
| | 0.062 | 1 | 3 & 4 | 3&4 |
| 5 & 6 |
| | 0.078 | 2 & 3 | 5 & 6 | 5&6 |
| 8 |
| | 0.094 | 4 & 5 | 8 | 8 |
| 10 |
| | 0.109 | 6 |
|
|
|
|
| ? | 0.125 |
| 10 | 10 |
|
|
| | 0.141 | 8 |
|
|
|
|
| | 0.156 | 10 |
|
| | |
| | 0.188 |
| | | ? | ? |
| | 0.219 |
| ? | ? |
| |
|
| 0.250 | | |
|
|
|
| | 0.312 | ? |
|
| ? | ? |
| ? | 0.375 | | ? | ? |
|
|
| | 0.438 |
|
|
|
|
|
|
| 0.500 | ? |
|
| 1 | ? |
| | 0.562 |
| ? |
|
| 1 & 1 ? |
| ? | 0.625 |
| 1 |
| 1 | 1 & 1 ? |
|
| 0.750 | ? & 1 | 1 ? |
|
| 1 |
| ? | 0.875 | 1 ? & 1 | 1 & 1 ? |
| 1 |
|
| 1 | 1.000 | 1 ? & 1 | 1 |
| 1 | 1 & 2 |
| 1 | 1.250 | 1 |
|
| 2 |
|
| 1 | 1.500 | 2 |
|
|
|
|
| 1 | 1.750 | 2 & 2 |
|
|
|
|
| 2 | 2.000 | 2 |
|
|
|