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Schwinn 6K399 C-channel inner corner describes a dedicated corner piece from Schwinn Hardware that joins aluminum C-channels, so two channel lengths meet cleanly and maintain a continuous look around an inside corner. The part is designed as a plastic corner piece, so it seats into the channel profile and creates a defined intersection between runs, which helps keep alignment consistent from one leg of the corner to the other. The corner piece is specified for 7/8 in (22 mm) wide C-channels, so it matches that channel width and supports a uniform reveal along cabinet or furniture edges where that profile is used. The finish is dark bronze, so the visible section at the corner follows the same color tone as dark bronze C-channel runs, helping the corner transition read as intentional trim instead of a cut joint.
The plastic corner pieces allow you to make a straight cut to the channel, so instead of cutting miters at every corner, the installer cuts square ends and relies on the molded corner to define the angle, which simplifies saw setup. Two channel lengths fit into the corner piece, so each leg of the corner is cut to length and then pushed into the connector, which helps maintain repeatable dimensions from piece to piece. The ability to form a finished inner or outer corner from these parts means the same basic cutting process applies at both types of corners, which supports consistent workflow across a run of decorative channels. Schwinn Hardware also provides installation drawings and templates at the referenced URL, which present the manufacturer layout and help align field work with the intended channel system geometry.
The SAP description identifies the product as an inner corner for ALU C-channels, so it is tailored to connect aluminum C-channel profiles in installations that turn a corner. The web description states that the plastic corner pieces allow you to create a finished inner or outer corner, so a single component style is used when the channel turns inward or outward, which simplifies planning for decorative hardware layouts. Because the part is matched to 7/8 in (22 mm) wide C-channels, it fits that specific width and keeps the visible edge line continuous as the trim transitions around cabinetry or casework. The dark bronze designation further aligns it with dark bronze channel runs, so the corner section visually blends with adjacent lengths, supporting a unified appearance on projects that specify that finish.
The statement that plastic corner pieces allow you to make a straight cut to the channel highlights that each channel section is cut square, then seated into the connector, which reduces layout complexity compared with cutting precise miters in aluminum. Two lengths fit into the corner piece, so the installer works with measured straight sections that meet inside the molded part, supporting consistent leg lengths and more predictable overall dimensions. The ability to achieve a finished inner or outer corner through this connector means the same straight-cut method applies across different corner conditions, which supports repeatable shop or field workflows when running multiple channels along cabinets or furniture. Referencing installation drawings at the Schwinn website gives access to the official geometry for the 6K399 series system, so installers can align cut lengths and corner positions with the documented channel layouts.
The Schwinn 6K399 C-channel inner corner is specified for 7/8 in (22 mm) wide C-channels, so it aligns with that channel width when planning decorative hardware runs.
The plastic corner pieces allow straight cuts to the channel, so installers cut square ends and use the molded corner for the angle instead of cutting channel miters.
The plastic corner pieces are described as providing a finished inner or outer corner, so the same style is used when channels turn inward or outward around cabinets.
The web description identifies these as plastic corner pieces, so the part is molded plastic shaped to receive aluminum C-channel sections at the corner.
This version is a dark bronze C-channel inner corner, so it is suited to dark bronze channel runs where a matching corner color is required for a continuous look.
Installation drawings and templates are available at the Schwinn website URL listed in the description, so installers can reference the manufacturer layout details.
The Schwinn 6K399 C-channel inner corner in dark bronze ties directly to 7/8 in (22 mm) wide aluminum C-channels, so it fits that system when planning trim around cabinets or furniture. The plastic construction and molded profile let two straight-cut channel sections seat into the corner, so angular transitions are handled by the connector instead of the saw setup. The ability to form a finished inner or outer corner from the same part helps standardize channel work where multiple corner types appear. For projects built around Schwinn Hardware aluminum C-channels in dark bronze, this 59282 corner piece provides the dedicated junction component for those transitions.