Kugi means nail - on the wall or on hands?

[anshbansal]

Google translate told me kugi (when written in hiragana) is nail. Does this refer to the nails which are placed on wall or which are on hands?

[YukiPhoenix]

The fastener nail.

[pahko]

Allow me to introduce you to jisho.org, which I visit constantly

So the wall one. The metal spiky one.

[YukiPhoenix]

Also to add, nail for fingernail or toenail would be 爪 (つめ).