Dear Chang san,
Good Day! Pls see the drawing of BS1060-M4.0X20(DK8.1) as attached.
Regarding this item, because you are in hurry to ship the first 50M on 11/22, we revised the original punch-pin to meet your need on DK 8.1 to save more time on making the new one. Pls noted we revised the Head Hight a little on drawing to be smaller than the sample received from you. If you would like to check the samples before mass production, we can send you at first, but surely, the delivery will postpone few times.
We look forward to hearing your comments to see how to arrange our production line.