Estandarte imperial
| Diámetro del perno | Tamaño de cabeza y llave | |
|---|---|---|
| Perno hexagonal – Perno de retraso – Perno cuadrado | Perno hexagonal pesado | |
| #6 | 1/4″ | – |
| #8 | 1/4″ | – |
| #10 | 5/16″ | – |
| #12 | 5/16″ | – |
| 1/4″ | 7/16 ″ o 3/8 ″ | – |
| 5/16″ | 1/2″ | – |
| 3/8″ | 9/16″ | – |
| 7/16″ | 5/8″ | – |
| 1/2″ | 3/4″ | 7/8″ |
| 9/16″ | 13/16″ | – |
| 5/8″ | 15/16″ | 1-1 / 16 " |
| 3/4″ | 1-1 / 8 " | 1-1 / 4 " |
| 7/8″ | 1-5 / 16 " | 1-7 / 16 " |
| 1 " | 1-1 / 2 " | 1-5 / 8 " |
| 1-1 / 8 " | 1-11 / 16 " | 1-3 / 4 " |
| 1-1 / 4 " | 1-7 / 8 " | 2 " |
Estándar métrico
| Diámetro del perno (mm) | Tamaño de cabeza / llave (mm) | |||
|---|---|---|---|---|
| ANSI / ISO | DIN | JIS | DIN / ISO Maleficio pesado | |
| 4 | 7 | 7 | 7 | – |
| 5 | 8 | 8 | 8 | – |
| 6 | 10 | 10 | 10 | – |
| 7 | – | 11 | – | – |
| 8 | 13 | 13 | 12 | – |
| 10 | 16 | 17 | 14 | – |
| 12 | 18 | 19 | 17 | 22 / 21 * |
| 14 | 21 | 22 | 19 | – |
| 16 | 24 | 24 | 22 | 27 |
| 18 | – | 27 | – | – |
| 20 | 30 | 30 | – | 34 / 32 * |
| ANSI - Instituto Americano de Estándares Nacionales ISO - Organización Internacional de Normalización DIN - Deutsches Institut für Normung JIS - Norma industrial japonesa * Indica el estándar ISO. | ||||