There is some more information we do need your help to advise in order to trace back.
1. Was it the item of 38 mm closure.?
2. When was your capping date that you put the closure into your production line ?
3. If the closure were delivery since last year during August , 2012, and in case that you produce just now, it mean you keep the inventory for more than 1 year before using in capping line. Please advise if my understand is right.
4. If as per point 3 is right, please inform why you are keeping it too long before use.
Kindly advise so that we can be more details investigate for you.