Strong's #6959: qowba` ko'-bah (pronounced or ko-bah')
a form collateral to 3553; a helmet:--helmet.
Brown-Driver-Briggs Hebrew Lexicon:
qôba‛
1) helmet
Part of Speech: noun masculine
Relation: a form collateral to H3553
Usage:
This word is used 2 times:
1 Samuel 17:38: "David with his armor, and he put a helmet of brass upon his head; also he armed"
Ezekiel 23:24: "against thee buckler and shield and helmet round about: and I will set judgment before"