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Blum 552H undermount drawer slides give you a 3/4 extension drawer runner that supports smooth access while keeping the slide hardware hidden under the drawer, which helps finished cabinetry present a clean appearance from the front. The 21 inch slide length matches 21 inch drawer applications, so casework can be laid out around this fixed dimension during planning. This Blum, Inc. slide is part of the 552H series, which keeps components consistent across similar drawer sizes in a project. The 5/8 side designation ties these slides to drawer boxes built around a 5/8 inch side thickness, so box construction and hardware selection stay aligned. Being an undermount drawer slide classed as a slide for drawers, this model suits projects where visible side-mount hardware is not wanted and where precise layout around known slide length is important.
The 5/8 side callout in the description identifies this slide for use with drawer boxes framed around 5/8 inch thick sides, so shop drawings can standardize on that material thickness. As an undermount drawer slide in the Drawer Slides & Accessories category, this unit fits assemblies where the runner mounts beneath the drawer rather than on the sides, keeping the hardware out of sight. The 21 inch length guides the cabinet depth and drawer box design, which helps installers line up the slide setbacks and drawer fronts with surrounding faces during fitting.
The 21 inch 552H 3/4 EXT TANDEM description defines this slide as a 21 inch undermount unit, which suits cabinet sections planned around that interior depth so drawers align with face frames or frameless fronts. Because the slide is part of the 552H TANDEM family from Blum, Inc., it matches other 552H series lengths and configurations, helping shops keep hardware uniform across kitchens, baths, or commercial casework using similar drawer construction. The 5/8 side note links these slides to drawer boxes built around 5/8 inch side material, so production lines set up for that thickness can specify this slide consistently from job to job. With the undermount classification, the hardware sits under the drawer, which suits visible furniture-style installations where exposed side runners are not desired.
The 3/4 EXT detail in the product name signals a three-quarter extension action, which means the drawer does not travel its full length and therefore uses a shorter stroke that can help when clearances behind the cabinet are limited. This travel pattern gives access to most of the drawer interior while keeping some portion supported inside the cabinet, which installers may favor in standard-depth bases. The specific Blum BP552H5330N and manufacturer part number 03586582 identifiers anchor this slide to a precise configuration in the Blum 552H lineup, reducing confusion when matching replacement slides to existing installations built on the same series. Knowing it is categorized as an undermount drawer slide in the Slides, Undermount group helps specifiers separate it from side-mount or other slide styles when standardizing hardware choices across larger projects.
The Blum BP552H5330N is an undermount drawer slide from the 552H TANDEM series, so it mounts beneath the drawer box for a concealed runner appearance.
The 21 inch 552H slide is suited to drawer applications designed around a 21 inch slide length, aligning drawer depth with that fixed runner dimension.
The 3/4 EXT designation indicates these slides allow the drawer to open to about three-quarters of its length, giving access to most of the interior space.
The 5/8 side designation ties this slide to drawer boxes using 5/8 inch side material, so box construction can be built around that thickness.
This Blum 552H slide is classed as an undermount drawer slide in the Drawer Slides & Accessories category, indicating its role as a concealed drawer runner.
The identifiers BP552H5330N and 03586582 uniquely mark this 21 inch 552H 3/4 extension undermount slide, helping match new orders or replacements to the exact slide version.
This 21 inch 552H 3/4 EXT TANDEM slide from Blum, Inc., identified as BP552H5330N and manufacturer part 03586582, gives you an undermount drawer slide aligned to 5/8 side drawer construction. When a project calls for a concealed 3/4 extension runner in a 21 inch length, this specific 552H series model offers a consistent platform to reference by number across drawings, purchasing lists, and future replacement needs.
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