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1930mm concealed door straightener gives passage doors a built-in way to counter warping, so large or tall doors stay straighter over time. This Sugatsune America DSR423-1930-25 model is designed as passage door hardware, so it works directly where warp can show up first. The straightener is recessed mounted under laminate, so it stays hidden while still doing the structural work inside the door. A plain/nickel finish on the concealed straightener and cover cap supports a clean, professional build where exposed hardware needs to stay minimal. This fully concealed design helps preserve the visual lines of the door while still delivering mechanical correction. At 1930mm length and suitable for 64-80 inch applications, it covers a substantial portion of the door height, which improves straightening leverage on problem-prone doors.
This Sugatsune America straightener is installed at the time of manufacturing, so the corrective hardware becomes part of the door core rather than an afterthought. Recessed mounting under laminate keeps the profile inside the door thickness, so edge and face details stay unchanged. The unit offers plus or minus 10 mm adjustment that can be made from the top of the door with an M4 Allen key, so tweak work happens from an accessible edge instead of disassembling the door. Because the minimum door thickness is 12 mm (1/2 inch), it aligns well with many engineered or laminated passage doors, which simplifies design choices around core build-ups and layups.
Sugatsune door straightener DSR423-1930-25 is intended for passage door hardware applications, so it is suited to interior doors where appearance and flatness both matter. The straightener is available for recessed and concealed installation, which gives door manufacturers flexibility to match different construction styles while still using the same corrective hardware. Installed at the time of manufacturing, the unit becomes part of the door assembly, so its 1930mm length can act over most of the door height on 64-80 inch doors. That length coverage helps counter bowing tendencies along the full span rather than only at localized points. Because the straightener sits recessed under laminate, it is well suited to laminate-faced doors where surface continuity is important across stiles and rails.
This concealed door straightener with cover cap plain/nickel relies on adjustment of plus or minus 10 mm from the top edge, so installers can dial in the needed corrective force after the door is hung and any initial movement is visible. Using an M4 Allen key as the adjustment tool keeps the interface simple and consistent, which speeds up field adjustments across multiple doors on the same project. Optional mounting holes that accept four M4 (U.S. #8) flathead countersunk wood screws let the straightener pull tightly into the door, so loads transfer firmly into the core rather than relying only on friction. As part of Sugatsune America's straightener lineup, alongside models DSR213 and DSR403, this DSR423-1930-25 model extends that same warp-prevention concept to doors in the 64-80 inch range, giving fabricators a coordinated approach across various door heights.
The 1930mm concealed door straightener is classified as passage door hardware, so it is used on passage doors where maintaining flatness and alignment is important.
This Sugatsune America straightener is installed at the time of manufacturing, so it becomes integrated into the door structure before laminates or finishes are applied.
The door straightener is recessed mounted under laminate, so it sits within the door thickness and remains hidden while contributing structural correction.
The straightener requires a minimum door thickness of 12 mm, or 1/2 inch, which guides door construction choices for compatible builds.
The 1930mm concealed door straightener allows plus or minus 10 mm adjustment from the top of the door using an M4 Allen key, enabling controlled warp correction.
Optional mounting holes accommodate four M4 (U.S. #8) flathead countersunk wood screws, which provide additional mechanical anchoring into the door core.
The 1930mm concealed door straightener with cover cap plain/nickel gives passage doors a built-in way to resist future warping using recessed, fully hidden hardware. Its plus or minus 10 mm top-edge adjustment with an M4 Allen key lets installers tune door flatness on site. With suitability for 64-80 inch applications and a minimum 12 mm door thickness, it fits many modern laminated door builds. For projects needing concealed warp control that integrates at manufacturing time, this Sugatsune America DSR423-1930-25 straightener provides a focused solution.