[KTL]

I believe it's the later struts that have the external threads as shown in the pictures. My '87 and '86 911s with original Boge struts both have used the Bilstein nuts that are female thread (struts with external threads as pictured) when installing new inserts.

Cory,

I have a set of good used Bilstein inserts in the basement that were "discarded" by a friend's shop when he had the Boge struts converted to JRZ. I'll look at those inserts tonight and see if I have the nuts are still with the inserts.