small Jacob's chuck

[Phil Pascoe]

FTAGH. Little 3/8th Jacobs MC6661 chuck. I haven't the key, but must be of use to someone. The internal thread is quite fine and I would think imperial not metric. (I've had it kicking around for about 30 years. ) Draw 7pm tomorrow if more than one interested.

 

[Rorschach]

Thread is almost certainly 3/8-24 and since it's a female thread it's likely from a drill.

 

[Phil Pascoe]

I shall donate it to my mate at the market tomorrow rather than dump it. I thought it was 3/8" but it is actually 0 - 5/16"