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The Knape and Vogt 8520 Series is an 18 inch full-extension side-mount ball bearing file drawer slide rated 175 lb per pair, built for file drawers, deep storage, and any application where the standard 100 lb cabinet class comes up short.
File drawers loaded with hanging folders routinely push past the 100 lb limit that standard cabinet slides are rated for. The 8520 Series closes that gap with a 175 lb per pair rating and a hold-in anti-rebound detent that keeps a loaded drawer from drifting or rebounding open after it is pushed shut — a real advantage in an office or legal file environment where drawers get closed quickly and firmly. Full extension means the rearmost files are reachable without fishing, which matters when the drawer holds a full run of folders from front to back.
The slide also suits deep shop drawers, heavy utility pull-outs, and anywhere the drawer load or the frequency of use has caused a lighter-duty slide to wear prematurely.
The 8520 Series is built from cold-formed steel members with a zinc finish for indoor corrosion resistance. Zinc is the standard working finish for this slide class — functional and durable through years of daily cycling without being a decorative element. The ball bearings run in full-length raceways so load is distributed across the bearing train rather than concentrated at wear points. This is not a stainless or epoxy finish; it is an indoor file and storage slide.
The 8520 Series is the right call for office furniture builders and cabinet shops specifying file drawers, legal-size lateral files, or any heavy pull-out that outlasts standard-class hardware. It mounts in frameless cabinets directly on the 32mm system grid and in face-frame cabinets with the addition of rear mounting brackets, sold separately — the brackets are series-specific, so order them together. Side clearance is 1/2 inch per side, so the drawer box goes in 1 inch narrower than the cabinet opening. The Poly-Pack includes one pair, hardware included.
Per pair. Both slides together carry 175 lb — do not double that number when sizing for a specific drawer weight.
No. The hold-in anti-rebound detent is a mechanical catch that keeps the drawer closed and stops bounce-back. There is no damper and no spring assist — the drawer does not pull itself shut or slow to a cushioned stop.
No. The 8520 Series is non-handed — both slides in the pair are identical and fit either side of the drawer.
18 inches is the closed length of the slide. Because this is a full-extension design, the drawer travels approximately its full length, bringing the entire drawer out to the cabinet face — slide length and drawer travel are the same in practical terms on a full-extension model.
Side-mount slides need rear support in face-frame cabinets. Add the matching rear mounting brackets, sold separately — use brackets specified for the 8520 series, as rear brackets are not interchangeable across KV slide lines.
When file drawers or heavy storage pull-outs demand more than a standard cabinet slide can deliver, the KV 8520 Series brings the capacity and stay-closed reliability to keep the work moving.
Sold In: 1 Set
Quantity | Unit Price | Catalog | ||||
|---|---|---|---|---|---|---|
Sold in: 1 Set |  KV8520P-20 Mfr# 8520P 20 | KV 8520 20" Hold-In/Anti-Rebound Side Mount Full Extension 175 lb Ball Bearing File Drawer Slide, Poly-Pack, Zinc, 8520P 20 | ||||
Sold in: 1 Set | KV8520P-16 Mfr# 8520P 16 | KV 8520 16" Hold-In/Anti-Rebound Side Mount Full Extension 175 lb Ball Bearing File Drawer Slide, Poly-Pack, Zinc, 8520P 16 | ||||
Sold in: 1000 Each |  BST1/2X7-2C Mfr# 8500-93 | Knape and Vogt #7 x 1/2" Truss Head Hinge and Drawer Slide Installation Screw Phillips Drive - Sharp Point Fine Thread Zinc, 8500-93 - 1000/Box |
