Mark's Locksmith
| NAPA | X1014F | |
| Nasco | Night latch | 1022 |
| National | padlocks | See Viro, MDK, Squire, Master |
| National Cabinet | See Ilco #60 | |
| National Cash Register | See Ilco #60 | |
| National E-Z Set | knob locks | 1177N |
| National Rockford | R1064E, R1064D, 1064D | |
| NCR | read key | X1000FR |
| NCR | reset switch | 1043B |
| New Holland | LB620 Loader Backhoe | 1430 |
| Neiman boat | Volvo Penta | 62DN, 62DS, NE10 |
| Nesco | 1022 | |
| Newman | trunks | T73, T74, T75 |
| NJ | Xerox | 1069L, 1069N |
| NLCO | National Lock | 1545 |
| Norwalk | See Ilco #60 |