Hammond CLSR44U 44U Square-Hole 19-Inch Panel Rail Pair

The CLSR44U is a pair of 19-inch panel rails with square holes, providing a full 44U of mounting height in a single continuous span. It is an optional mounting rail set for the CLC Series colocation server rack cabinet frame, intended for data center, telecom and service provider technicians who need to convert or supplement bay-level rail configurations with a single full-height rail pair.

Each rail is formed from mild steel and finished in painted thin film black. The hole pattern uses 0.38 in square holes on typical EIA spacing, so standard 19-inch rack equipment mounts with square-hole cage nuts or tool-free mounting hardware. White silkscreened U markings run the length of the rail to make unit positions easy to identify during installation and later equipment moves. Mounting hardware is not included.

The rail pair measures 77.03 in (1957 mm) overall, with a published mounting dimension of 77.00 in (1956 mm) for 44U of usable rack space. Each rail carries four 0.31 x 0.50 in attachment slots (two vertical, two horizontal) for fastening to the cabinet frame. Shipping weight for the CLSR44U pair is 12 lbs (5.44 kg).

CLSR44U is manufactured in Canada, is USMCA and TAA compliant, and is RoHS and REACH compliant. Applicable standards listed for the part are cULus and PCI, with UL File # E474597. Because the CLC frame accepts multiple bay configurations, a 44U rail pair such as this one suits deployments where a single tenant or department uses the full frame height, while 10U, 14U and 21U rail pairs cover segmented multi-bay layouts.