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4' barn door flat rail is a Knape and Vogt rolling barn door hardware component that provides the straight track surface for a barn door system. This aluminum flat rail is specified at 48 inches in length, so it suits openings and layouts designed around a 4-foot track. The rail is used with KV's barn door hardware kits, sold separately, which means it functions as the track element within that coordinated kit family. A black finish on the rail gives the installation a dark, uniform look that can match other black KV barn door hardware components. The rail is offered in a five pack under the FR-BK-04 part number, so multiple rails are supplied under one order reference for multi-door runs or repeated openings. As rolling barn door hardware, this rail belongs to the builders hardware category, supporting barn-style door movement along the wall.
This Knape and Vogt 48 inch aluminum flat rail works as the track element in a rolling barn door hardware layout that uses KV's barn door hardware kits, sold separately. By specifying a 4-foot length, the rail sets a clear dimension for door travel, so framing and door sizing can be planned around that linear distance. The black finish allows the rail to visually align with other black finish components from the same barn door hardware class, which helps maintain a consistent look on exposed hardware. As part of a builders hardware rolling barn door hardware category, this flat rail suits barn-style doors that slide along a wall-mounted track rather than swinging, defining the path for the hangers that roll on its edge.
This 4' barn door flat rail fits projects built around rolling barn door hardware where a 48 inch track length is appropriate for the door width and wall area. Because it is used with KV's barn door hardware kits, sold separately, the rail aligns with those kits in profile and finish for coordinated installations. In builders hardware applications, the rail is suited to barn-style doors that slide on exposed track, so its black finish supports designs that feature visible, dark hardware components. The 48 inch length places the product in the shorter rail range compared with 72 and 96 inch options from the same family, making it suitable where space is tighter or where the door itself is more compact.
Selecting the FR-BK-04 48 inch aluminum flat rail helps keep barn door installations consistent when multiple 4-foot openings are planned, because the same length rail repeats across each location. The aluminum construction provides a defined, rigid flat rail profile for the rolling barn door hardware to travel on, contributing to predictable movement along the track edge. Pairing this black finish rail with KV's barn door hardware kits, sold separately, aligns the visual appearance of the rail and the hardware kit components, which supports uniform project results across a series of doors. When a mix of openings requires different travel distances, the availability of related 48, 72, and 96 inch rail lengths within the same Knape and Vogt family allows using the same style and finish while adjusting only the rail length.
This Knape and Vogt flat rail is 48 inches long, so it suits barn door layouts that are planned around a 4-foot track length along the wall.
This flat rail is used with KV's barn door hardware kits, sold separately, serving as the track that works with the kit's rolling components.
The black finish provides a dark, uniform appearance on the rail, which coordinates visually with other black barn door hardware components in the installation.
The FR-BK-04 flat rail is made from aluminum, giving the track a defined, rigid profile for the barn door hardware to roll against.
This barn door rail family is offered in 48, 72, and 96 inch lengths, so projects can match the rail length to door width and wall space.
The five pack option for this 48 inch flat rail supplies multiple rails under one FR-BK-04 part number, which supports projects with several barn door openings.
The Knape and Vogt 4' barn door flat rail in black finish suits rolling barn door hardware projects built around a 48 inch aluminum track. When multiple 4-foot rails are required, the FR-BK-04 five pack allows standardizing length and finish across several openings. Used with KV's barn door hardware kits, sold separately, this rail helps keep barn-style doors moving along a coordinated, matching track system. For jobs calling for a defined 4-foot travel distance and a black rail appearance, this flat rail provides a focused option within the Knape and Vogt rolling barn door hardware family.
Sold In: 5 Each