254 SMO
| Remarks | Bolt size Metric | Bolt size UNC |
| NL3ss-254 | M3 | #5 |
| NL3,5ss-254 | M3,5 | #6 |
| NL3,5spss-254 | M3,5 | #6 |
| NL4ss-254 | M4 | #8 |
| NL4spss-254 | M4 | #8 |
| NL5ss-254 | M5 | #10 |
| NL5spss-254 | M5 | #10 |
| NL6ss-254 | M6 | - |
| NL6spss-254 | M6 | - |
| NL1/4"-254 | - | 1/4" |
| NL1/4"spss-254 | - | 1/4" |
| NL8ss-254 | M8 | 5/16" |
| NL8spss-254 | M8 | 5/16" |
| NL3/8"ss-254 | - | 3/8" |
| NL3/8"spss-254 | - | 3/8" |
| NL10ss-254 | M10 | - |
| NL10spss-254 | M10 | - |
| NL11ss-254 | M11 | 7/16" |
| NL12ss-254 | M12 | - |
| NL12spss-254 | M12 | - |
