Hello, the required screws for the installation are included in the package. The quantity of screws can be found from accessories section on the website and the file installation instructions. By FS on 30/11/-0001

FS could provide FHD, FHX, FHU and FHZ four series products for structured cabling solution demands. FHD High Density Series is a versatile solution in multiple sizes (1U/2U/4U) and styles for building backbones, data centers and enterprise applications. FHX Ultra HD Series is ideal for service providers, central office facilities, large enterprise and cloud data centers. FHU Series is designed to connect where fast deployment and simple maintenance are critical. FHZ Premium Ultra HD Series enables to provide the scalability to increase density as business demands evolve. By FS on 31/08/2019

For 4U enclosure, the FHD cassettes/panels are vertically installed for easy plug-n-play, and the cables are managed in the bottom radius post for management, the whole design improves ease of use. To achieve 16pcs installation capacity in 4U, it is recommended to use two 2U enclosures #73205 together. By FS on 16/05/2019

Yes, you are right. The FHD and FHX series products are not the same type, they are mutual mismatch. So FHD fiber enclosures need to be used with FHD cassettes or adapter panels, and also FHX fiber enclosures should match for FHX cassettes or adapter panels. By FS on 16/01/2019

No, kindly note that the FHD enclosures should match for FHD MTP/MPO Cassettes or FHD LC SC MTP FAPs. And #51608 can work with the industry standard LGX adapter panels. By FS on 14/01/2019