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HDS-20 left-hand light duty stay is a Sugatsune America down stay for top-opening flap doors, so it supports upward-opening fronts on cabinets or work surfaces. The soft-down function means the stay is designed to hold the door in the fully opened position, which stabilizes the flap at the top of its travel and helps work above or inside the cabinet without the door drifting. The left-hand configuration matches installations where the stay is mounted on the left side, which is important when planning hinge layout and hardware balance. The black finish ties in with darker hardware sets and casework, which helps keep sightlines clean on visible installations around work surfaces and tables.
The web description specifies that this stay is for top-opening flap doors used with piano, butt, or concealed hinges, which defines its place in the hardware stack when laying out a cabinet. Because the HDS-20 is designed to hold the door in the fully opened position, the mounting layout can be planned so the hinge carries the pivot while the stay supports the open position. The requirement that the HDS-20 is used in pairs sets expectations for drilling and layout on both sides of the opening, which helps plan repeatable installations across multiple cabinets or stations.
This product is specified as a light duty soft-down stay for a top-opening flap door, so it is aimed at applications where the door size and weight fit the HDS-20 torque bands. The web description notes that it is for top-opening flap doors used with piano, butt, or concealed hinges, which makes it suited to casework where those hinge types are already standard. Its role as a lid support and stay in the work surface and tables category means it works in applications such as upward-opening access panels or storage flaps above benches, where holding the flap fully open improves access. The black color pairs with darker cabinet finishes or black hinges, keeping the hardware visually consistent in open positions.
The description gives a clear torque calculation as Torque = Door Height x 1/2 x Door Weight, which turns basic door dimensions into a torque value for matching the stay to the flap. It then defines K-Type at 140 to 200 kgf.cm per pair, M-Type at 200 to 250 kgf.cm per pair, and H-Type at 250 to 300 kgf.cm per pair, which outlines three torque bands within the HDS-20 family. Using that formula ties the stay choice to actual door geometry and mass, which supports more predictable staying force across a run of cabinets. Because those ranges are specified per pair, they correspond directly to the requirement that HDS-20 is used in pairs, so the calculated torque lines up with real-world two-stay installations on each flap.
The HDS-20 left-hand light duty soft-down stay is designed for top-opening flap doors, so it supports upward-opening cabinet or work surface fronts that need controlled opening and a stable fully open position.
The HDS-20 stay is used in pairs, so one left-hand and one right-hand unit work together on a flap, providing balanced support and helping the door stay in the fully opened position.
The HDS-20 soft-down stay is for top-opening flap doors used with piano, butt, or concealed hinges, so it integrates with these common hinge styles on cabinets and work surfaces.
The HDS-20 torque calculation, Torque = Door Height x 1/2 x Door Weight, connects actual door size and weight to a torque value, guiding selection among K-Type, M-Type, or H-Type ranges.
Within the HDS-20 family, K-Type handles 140-200 kgf.cm per pair, M-Type 200-250 kgf.cm per pair, and H-Type 250-300 kgf.cm per pair, aligning each version with a different door torque range.
This Sugatsune America down stay functions as a lid support in the work surface and tables category, holding a top-opening flap door in the fully opened position during access.
The HDS-20 left-hand light duty soft-down stay in black from Sugatsune America is defined for top-opening flap doors using piano, butt, or concealed hinges, so it targets a clear group of cabinet layouts. Its role as a lid support that is designed to hold the door in the fully opened position helps keep access clear at benches, tables, and storage units. With the torque calculation and K/M/H-type ranges stated for pairs, it gives a structured way to align flap dimensions with the HDS-20 family. For projects matching these conditions, this left-hand stay provides a defined component choice in the work surface and tables hardware lineup.