Is “Locknut” a Scrabble word?
Yes
LOCKNUT
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Locknut
noun
1.A second nut, screwed down onto another in order to prevent it slipping.