Locknut

1 clue
Fastener that resists loosening
Similar answers:
Achipofftheoldblock
Aclockdidnotget
Aclockworklemon
Aclockworkorang
Aclockworkorange
Aclockworkorangecrush
Aclockworksepia
Aclockworkyellow
Adblock
Adblocker
Aflockofgs
Againsttheclock
Agalloch
Aidtolocateastreet
Airlock
Airlocks
Alarmclock
Alarmclocks
Allocable
Allocate