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This is a 1-1/2 inch rectangular nylon spacer from Bainbridge Manufacturing, designed to offset drawer slides away from the cabinet side wall or face frame so the slide seats at the correct depth for smooth, level drawer operation.
A 1-1/2 inch spacer earns its place when standard installation depth falls short. Face-frame cabinets with thick stiles, applied end panels, or interior partition walls often push the mounting surface far enough back that a thinner spacer leaves the slide angled or unsupported at the front. The 1-1/2 inch depth closes that gap cleanly, keeping the slide parallel to the drawer box and the drawer running true. This spacer also handles retrofits where a new slide goes into an existing cabinet that was not sized for it, or where a shop is standardizing on one spacer depth across a run of face-frame carcasses with consistent stile width.
Nylon polyamide is a practical choice for a part that lives inside a cabinet and takes the edge of every screw torque and side load the drawer slide produces. It does not split under the screw head the way softer plastics can, and it does not rust, corrode, or swell with humidity the way steel or wood shims do. The matte black color runs through the material rather than being a surface coating, so minor scuffs during installation do not expose a contrasting color underneath.
Cabinet shops running face-frame production lines keep a supply of these on hand for any run where the stile width calls for a 1-1/2 inch offset — ordering the correct thickness up front is faster than shimming on the job. Installers working in existing homes reach for the 1-1/2 inch spacer when an original side-mount slide has been removed and the replacement does not align with the old screw pattern. The black finish suits dark cabinet interiors, ebonized wood, or any install where the hardware should disappear rather than contrast.
The spacer itself is brand-neutral — it sits between the cabinet wall and the slide's mounting flange and is secured by the same screws that mount the slide. Confirm that your slide's mounting holes align with the spacer before installation, since hole patterns vary across brands and series.
Stacking is not recommended. Multiple pieces can shift under load and introduce play into the slide mount. A single 1-1/2 inch spacer gives a solid, stable bearing surface that stacked pieces cannot match.
Nylon handles humidity better than wood shims or uncoated steel, but this spacer is designed for interior cabinetry. For exterior or consistently wet environments, confirm the full hardware assembly is rated for that exposure.
Standard practice is one spacer per slide mounting point — typically two per slide, front and rear, and two slides per drawer, for a total of four spacers per drawer opening. Verify against the slide manufacturer's installation instructions for your specific slide series.
When a 1-1/2 inch gap stands between the cabinet wall and a properly seated slide, this black nylon spacer closes it cleanly — no shimming, no improvising, and nothing that will shift after the drawer goes in.
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