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    Slides, Undermount
    1. Home
    2. Drawer Slides & Accessories
    3. Slides, Undermount
    Item # KUKING75-21 • Mfr # 280-949

    King Slide 21 inch undermount drawer slides 280-949

    Description

    King Slide 21 Inch Undermount Slides For Drawers

    King Slide 21 inch undermount drawer slides are soft-close, full extension slides that support smooth drawer travel and controlled closing in cabinet projects. The undermount design keeps hardware under the drawer, which leaves the drawer sides clear for a clean interior and exterior. A full extension action brings the drawer completely out to the front, which improves reach to items at the back. The soft-close function is driven by a hydraulic mechanism that manages closing speed, which helps drawers settle without slamming against the cabinet. These slides are built around King Slide undermount precision engineering, which is designed to create a superior glide opening for consistent movement. The slides are manufactured with a zinc finish, which provides a hard metallic surface on the slide members. This product is intended for drawers with 3/4 inch side thickness, which sets a clear construction target when building or sizing drawers for these slides.

    Key King Slide Undermount Details For Projects

    • The King Slide undermount precision engineering supports a superior glide opening, which helps drawers move smoothly when opening and closing under everyday cabinet use.
    • The full extension action allows the drawer to travel completely out of the cabinet, which lets users access the full depth of the drawer without working around hidden space.
    • The hydraulic soft-close mechanism engages the drawer early in the closing motion, which provides an extended soft-close travel distance that reduces impact at the front of the slide.
    • The very light pull opening force reduces resistance at the handle, which helps users open drawers with less effort while still benefiting from guided slide movement.
    • The slides are designed to be used with 3/4 inch drawer side thickness, which aligns slide geometry with common drawer box construction dimensions for straightforward layout.
    • The zinc finish on the slides forms a protective metal surface, which helps the slide members work together smoothly over repeated opening and closing cycles.

    Undermount Slide Fit And Drawer Build Considerations

    These King Slide 21 inch soft-close full extension undermount drawer slides are designed around a 3/4 inch drawer side thickness, which helps determine drawer box sizing and clearances. The undermount configuration places the slides beneath the drawer, which influences the notch and groove details at the drawer bottom and rear. The hydraulic soft-close mechanism engages early in the closing stroke, which affects how the drawer is pushed for final closure during installation checks. A very light pull opening force shapes how the drawer feels at the handle, which is useful when planning for users who cycle drawers frequently. The zinc finish on the slide members provides a consistent metal interface, which contributes to repeatable motion as the slides run along their tracks.

    Using King Slide 280-949 Slides In Cabinet Work

    Where These Undermount Slides Are Typically Used

    The King Slide 280-949 21 inch soft-close full extension undermount drawer slides are suited to cabinet drawers that require an undermount slide layout with soft-close performance. Their undermount drawer slide classification places them in applications where the hardware must sit under the drawer, which supports a clear drawer side profile. The 21 inch length matches drawer depths built for that slide run, which ties the product to medium-depth cabinet drawers. The design around 3/4 inch drawer side thickness aligns with drawer boxes built from material at that thickness, which simplifies planning when sizing sides, bottoms, and clearances. The King Slide undermount engineering delivers a superior glide opening, which supports drawers that need controlled, consistent movement in residential or shop cabinetry.

    Details That Support Consistent Slide Performance

    The hydraulic soft-close mechanism in these King Slide undermount drawer slides engages early in the closing range, which extends the soft-close travel distance and helps the drawer transition from free movement into guided deceleration smoothly. This early engagement allows the slide system to control the final segment of travel, which limits abrupt contact at the cabinet front. The very light pull opening force shapes how the drawer starts from the closed position, which keeps initial movement smooth while the undermount members begin to roll. The zinc finish on the slide components provides a uniform metallic surface, which supports precise interaction of the slide members during repeated use. As a complete soft-close, full extension undermount system, these King Slide 21 inch drawer slides combine their engineering details to support predictable drawer motion in finished cabinetry.

    Common Questions About King Slide 21 Inch Undermount

    What type of slide are King Slide 280-949 units?

    King Slide 280-949 units are soft-close, full extension undermount drawer slides, which position the hardware under the drawer while supporting complete drawer travel.

    How does the hydraulic soft-close on these slides work in practice?

    The hydraulic soft-close mechanism engages the drawer early in the closing motion, which extends the controlled travel distance and helps the drawer settle gently at the front.

    What drawer side thickness suits these King Slide undermount slides?

    These King Slide undermount drawer slides are designed to be used with 3/4 inch drawer side thickness, which aligns slide geometry with that specific drawer construction dimension.

    Why does full extension matter on these 21 inch drawer slides?

    The full extension function lets the 21 inch drawer extend completely, which exposes the full drawer depth and improves access to items stored at the back.

    How does the very light pull opening force affect use?

    The very light pull opening force reduces resistance at the handle, which helps users start drawer movement easily while the slide system guides the motion.

    What role does the zinc finish play on these undermount slides?

    The zinc finish provides a hard metallic surface on the slide members, which supports smooth interaction of components over repeated opening and closing cycles.

    Selecting King Slide Undermount Slides For Drawers

    The King Slide 21 inch undermount drawer slides combine soft-close, full extension travel, and a design for 3/4 inch drawer side thickness, which aligns well with many cabinet drawer builds. Their undermount layout keeps the hardware under the drawer, which supports clean drawer sides in finished work. The hydraulic soft-close mechanism and very light pull opening force shape the way the drawer feels from open to close, which matters when planning user interaction. For projects calling for a 21 inch undermount run with controlled closing, these King Slide 280-949 soft-close slides offer a focused solution for cabinet drawers.

    Drawer Length (in)
    21 in
    Product Type
    Undermount Drawer Slide
    Motion Technology
    Soft-close
    Extension
    Full extension
    Weight Capacity
    75 lb
    Cabinet Type
    Face-frame, Frameless
    Material Type
    Steel
    Maximum Drawer Thickness
    3/4 in
    Minimum Installation Depth
    24 in
    Nomial Length
    21-1/2 in
    Color/Finish
    Zinc
    Manufacturer Series
    King 1B68F
    Supplier Pack Size
    6
    Sold In
    1
    Drawer Length (in)
    21 in
    Product Type
    Undermount Drawer Slide
    Motion Technology
    Soft-close
    Extension
    Full extension
    Weight Capacity
    75 lb
    Cabinet Type
    Face-frame, Frameless
    Material Type
    Steel
    Maximum Drawer Thickness
    3/4 in
    Minimum Installation Depth
    24 in
    Nomial Length
    21-1/2 in
    Color/Finish
    Zinc
    Manufacturer Series
    King 1B68F
    Supplier Pack Size
    6
    Sold In
    1
    9 in12 in15 in18 in21 in24 in
    5/8 in3/4 in
    12 in15 in18 in21 in24 in27 in
    10-1/16 in12-1/2 in15-1/2 in18-1/2 in21-1/2 in24-1/2 in
    46% off
    Price Drop
    $18.99$34.94/SetYou save $15.95
    King Slide 21 inch undermount drawer slides 280-949
    Item# KUKING75-21 / MFR Part # 280-949
    Set
    King Slide
    Set
    In Stock

    Sold In: 1 Set

    Set

    Additional Accessories

    Quantity
    Unit Price
    Catalog
    Sold in: 6 Set
    KUKING75-12
    Mfr# 280-946
    King Slide 12 inch undermount drawer slides 280-946
    Sold in: 6 Set
    KUKING75-15
    Mfr# 280-947
    King Slide 15 inch undermount drawer slides 280-947
    Sold in: 6 Set
    KUKING75-18
    Mfr# 280-948
    King Slide 18 inch soft close undermount drawer slides