H1TRR48U30BK is a pair of 48U mounting rails with #10-32 UNF tapped holes on EIA spacing, intended as replacement or additional rails for 48U-height Hammond wall and floor mount rack cabinets in the HWF Series. It suits IT and telecom installers, AV integrators and facilities teams who need threaded 19-inch rail sets for standard rack equipment in high-capacity network and telecom installations.

The rails are formed from mild steel and painted thin film black, and they are sold as a pair. Silkscreened U markings run the length of each rail so rack units can be identified quickly during equipment layout, installation and later servicing. Mounting slots (4X, 0.44 x 0.75 in) are provided for fastening the rails in the cabinet.

Each rail provides 48U of mounting height over 84.03 in (2134 mm), with the standard 1.75 in (44 mm) per rack unit pitch and 18.35 in (466 mm) between rail centers for 19-inch panel mounting. Shipping weight for the pair is 26 lbs (11.79 kg).

Within the HWF Series, the 10-32 tapped rails are field-replaceable with square hole rails, so H1TRR48U30BK can be used where threaded-hole mounting is preferred over cage nuts. For 48U cabinets, the square hole equivalent is H1SRR48U30BK, and compatible vertical accessories include the VCT85 vertical cable tray and the H1VFMC3048UBK vertical finger manager with cover.

The part is manufactured in Canada, is USMCA and TAA-compliant, and carries cULus recognition under UL File # E475597. It is RoHS and REACH compliant, with ECCN EAR99 for export classification.