ロックナットです
rokkunattodesu
1. Lock nut.
Noun
#359636
1. Lock nut.
1. lock
2. lock (in rugby); lock forward
1. rock (music)
2. rock; boulder
3. on the rocks (drink)
1. natto (fermented soybeans)
1. nut (as in nut and bolt)
2. (edible) nut
1. automatic lock
2. automatic door-locking system
1. hard rock
1. rock wool; mineral wool
1. Little Rock
1. It is not rock.; It's not locked.