Need Help To Identify Key.

[Hope14]

Hi - Hope someone can tell me what this key was made for. It measures 3&1/2 inches long. The Bow and Shaft are brass with the last inch being steel. The steel end consisting of the Hex Opening. The Hex Opening measures .360 Thousands, not quite 3/8", but more than5/16". ANY INFO WOULD BE GREATLY APPRECIATED. Thanks - Rex

[kwoswalt99]

Looks like a clock key to me.

[wylk]

Looks like a clock key to me.

I thought the same thing but I've never seen a hexagonal clock key; they are all square, or at least all the ones I'm aware of.

[Hope14]

Thanks for info received. I also thought all clock keys had square drive. Some Banjo Head nuts are Hex Shape. Anyone have any thoughts on this? - Rex

[YALE7750]

Perhaps it's for turning a gas valve in a very old floor furnace or a fireplace? I recall my grandfather using a key to turn on the heat from a very old floor mounted gas furnace, but the key wasn't quite as fancy as this. I don't know if it was square or hex drive though. Still looks like a clock key to me.

[wylk]

Could this be a key for a screw lock?

[Hope14]

Thanks to everyone for the Info. I Welcome more ideas. - Rex

[king7714]

Hexagonal pins are occasionally used in passage locks, and this may be for this sort of one-sided use.

[Hope14]

Thanks For The Info, I Did Not Know This. - Rex

[BBE]

Thanks For The Info, I Did Not Know This. - Rex

There is a window lock called Fayle-Safe that used a key like this. Made from around the 1970's until now, not sure if they have a hex key.
BBE.

http://www.ebay.com/itm/like/1522610...&ul_noapp=true