EN 1.7182
| Remarks
| Bolt size Metric | Bolt size UNC |
| NL3 | M3 | #5 |
| NL3,5 | M3,5 | #6 |
| NL3,5sp | M3,5 | #6 |
| NL4 | M4 | #8 |
| NL4sp | M4 | #8 |
| NL5 | M5 | #10 |
| NL5sp | M5 | #10 |
| NL6 | M6 | - |
| NL6sp | M6 | - |
| NL1/4” | - | 1/4” |
| NL1/4”sp | - | 1/4” |
| NL8 | M8 | 5/16” |
| NL8sp | M8 | 5/16” |
| NL3/8” | - | 3/8” |
| NL3/8”sp | - | 3/8” |
| NL10 | M10 | - |
| NL10sp | M10 | - |
| NL11 | M11 | 7/16” |
| NL12 | M12 | - |
| NL12sp | M12 | - |