Deltana CSA12 Colonial Casement Stay Adjuster, 12"

Plan for the full 12 inch arm length swinging along the sill, plus the sill plate footprint of 1-3/4 x 3/4 inches. The arm is 3/8 inch in diameter, so it sits proud of the sill by that much when the window is shut. If your sill is shallower than the arm's travel, or a screen or storm panel sits in the way, the shorter Deltana casement stays are the right call instead.

No. A stay adjuster like the CSA12 works on a hinged casement sash that swings, holding it open at a chosen position against a sill or jamb plate. A double-hung sash slides vertically and has nothing for the arm to work against. On an inswing casement the arm and its sill plate land inside the room where they foul the sill and any interior treatment, so a stay is normally specified for outswing. For a sash that only needs to be held shut rather than held open, a casement fastener or sash lock is the part you want.

Nine finishes: PVD Polished Brass, Polished Brass, Antique Brass, Oil Rubbed Bronze, Brushed Nickel, Antique Nickel, Polished Chrome, Brushed Chrome, and Paint Black. If you are matching existing hardware across a run of windows, PVD Polished Brass and standard Polished Brass are two separate options, so specify which one you are matching.

No. Each CSA12 ships in its own poly bag with matching screws, so the sash plate and sill plate mount out of the box. Sold each, so one unit covers one sash.

Solid brass, both the material and the substrate. That matters on a casement stay because the arm carries the sash load in wind and a plated pot-metal arm is where these fail. Brass also holds up on coastal and high-humidity openings, and Deltana rates the CSA12 for commercial use, not just residential.

The CSA12 is the Colonial pattern stay adjuster, so it lines up with Deltana's colonial-style window hardware and the nine finishes give you a match to most existing brass, bronze, nickel, chrome, or black hardware already on the openings. For a fleet of windows, order all units in one finish code and note that PVD Polished Brass and Polished Brass are distinct: PVD is the coated version and reads differently against unlacquered brass that has aged.

Length sets how far the sash can open. The 12 inch CSA12 gives a wider opening swing, which suits taller or wider casement sash where you want real ventilation. On a small sash, a 12 inch arm will let the window open further than the sash geometry or the reveal allows, and the arm ends up hanging past the sill plate. Measure the sill depth and the swing you actually want before picking the length; Deltana builds this same colonial stay adjuster in shorter arm sizes.

Two plates, two different footprints. The sash plate is 2-1/4 x 1 inches and takes the pivot end of the arm on the sash. The sill plate is 1-3/4 x 3/4 inches and mounts on the sill or frame. Set the sill plate so the 12 inch arm clears the sash edge through its full travel, then screw off with the supplied matching screws. On a hollow or thin sash rail, check you have solid material behind the sash plate before committing.