We frequently get questions regarding proper handling and assembly instructions for the ZE064W series of rectangular connector housings from Hirose Electric Co Ltd such as the ZE064W-8DP-HU/R(A). We reached out to Hirose on this one and they responded with the following:
The customer definitely should configure their assembly process in a way that prevents the panel seal from being touched intentionally or accidentally. The panel seal for PN ZE064W-8DP-HU/R(A) is not sold separately and does not have its own orderable Hirose part number. PN ZE064W-8DP-HU/R(A) comes with the panel seal already assembled to the housing as shown in the illustration above.
They also included documents for assembling the product, please refer to these documents for a more in-depth discussion of the assembly process.
ETAD-T0947-00.pdf - Handling Manual (2.2 MB)
ETAD-T0670-00.pdf - Instruction Sheet (944.0 KB)
For contacts, tooling, and accessories for this series of connectors please use the links below.
Rectangular Connector Contacts | Rectangular Connectors | Electronic Components Distributor DigiKey
Insertion, Extraction | Electronic Components Distributor DigiKey
ZE064W-WCP(2022) Connector Polarizing Device (Key, Plug, Post) For ZE064W Series