Adapter plate in hydraulic

[Powlu]

Sir,
We are using mainfold blocks in our application,we have some doughts please give suggestions sir.
Image attached below

1.why 4 no's ln key used in mainfold blocks, what is the use of that .
2.in some mainfold blocks named as 15x,14X . what is the meaning of 15X,14X ?


Please give any suggestions
Sorry for distrubence
Thanks & Regards

 

[hydtools]

The larger of the 4 plugs is probably blocking an unused port. The other 3 would be plugs to close construction passages or possibly test port access.

Ted

 

[Powlu]

Thanks you for your reply sir,
Can you please explain this picture also please ,what is meaning of 14X?