Zinc Finish And File-Grade Strength in a 20 Inch Side-Mount Slide
The Knape and Vogt 8500 Series 20 inch side-mount ball bearing drawer slide delivers 150 lb load capacity per pair in the standard zinc finish that blends into virtually any cabinet interior. Designed for file drawers, lateral files, and heavy storage drawers that push past the limits of a standard 100 lb cabinet slide, this full-extension slide brings the entire drawer out to the cabinet face and holds it there — or holds it closed — with a built-in anti-rebound detent. Sold in bulk-pack quantity for shops and contractors ordering in volume.
Key Features
150 lb load rating per pair — carries heavy file drawers and loaded storage that would overload a standard kitchen-class slide.
Full extension — the entire drawer clears the cabinet face, putting the rearmost contents within reach.
Hold-in anti-rebound detent — a mechanical catch keeps the drawer closed and prevents it from bouncing back open after a firm push.
Steel ball bearings with progressive movement — smooth, even travel through a full load cycle.
Non-handed design — one slide fits either side of the drawer, simplifying ordering and bench sorting.
Zinc finish on steel members — the catalog-standard corrosion-resistant finish for indoor service.
Built for Drawers That Work Hard
File drawers, lateral pulls, and deep storage drawers routinely load past the 100 lb line that standard cabinet slides are rated for. The 8500 series steps up with a 150 lb class rating per pair — enough for a full lateral file drawer, a loaded shop parts drawer, or a deep archive pull. The progressive ball bearing movement distributes that load evenly across the travel, so the drawer pulls with the same feel whether it carries ten pounds or a hundred. Full extension means the back of the drawer comes all the way out; there is no rearmost section you have to fish for.
Zinc, Steel, and Designed for Indoor Use
The slide members are cold-formed steel with a zinc electroplate finish — the workhorse surface treatment for side-mount ball bearing slides in indoor environments. Zinc keeps the steel protected through years of daily cycling and holds up against the humidity typical of office and cabinet shop conditions. The finish reads as a clean, neutral tone that recedes visually against most interior panel colors. This is not a decorative finish; it is a functional one built to last through the slide's service life indoors.
Who Reaches for the 8500 in This Length
The 20 inch length suits standard desk and lateral file pedestals, typical office drawer stacks, and kitchen utility drawers in 21 to 22 inch deep cabinets. Cabinet shops running bulk orders appreciate the bulk-pack format: the slide arrives loose in carton quantity, eliminating retail packaging to sort through on the bench. The non-handed format means a single bulk SKU covers every drawer in a run — no left and right to track, no mis-picks. The 1/2 inch side clearance requirement is the segment standard, so the 8500 drops into any opening already sized for a ball bearing slide of this class. In face-frame cabinets, plan for rear mounting brackets, sold separately, to support the back of the slide.
Is the 150 lb rating the moving load or just a static number?
The 150 lb is the class rating stated for this series per pair. For the distinction between dynamic and static values, consult the KV 8500 series technical data sheet — the key working number for a file drawer in regular use is the dynamic rating.
Does the anti-rebound detent pull the drawer closed on its own?
No. The hold-in detent keeps the drawer from bouncing back open after you close it — it does not spring-close or soft-close the drawer. Push the drawer shut and the detent holds it; pull the drawer and it releases normally.
How wide a drawer can the 8500 handle at this length?
KV recommends a maximum drawer width of 36 inches for the 8500 series full-extension model, making it well suited to standard lateral file drawer widths.
Do I need different slides for face-frame and frameless cabinets?
The slide itself installs in both construction types, but face-frame cabinets require rear mounting brackets at the back of the slide to bridge the frame setback. Those brackets are series-specific and sold separately.
What does bulk-pack mean for this SKU?
Bulk-pack means the slides ship loose in a carton rather than in individual retail bags. It is the preferred format for shops and contractors running multiple drawers — no extra packaging to open or discard at the bench.
The Right Slide Ships Ready to Work
When the drawer count is high and the load is real, the 8500 series in zinc delivers a file-grade, 150 lb class full-extension slide in the bulk format shops actually order — non-handed, ready to sort and install without a left-right puzzle on every cabinet run.
