• Ko-ken 3/8" Sq. Dr. Socket 21mm Nut Grip Length 29mm Front View
  • Ko-ken 3/8" Sq. Dr. Socket 21mm Nut Grip Length 29mm mechanical drawing
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Ko-ken 3/8" Sq. Dr. Socket 21mm Nut Grip Length 29mm

$15
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SKU: 3450M-21

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    Ko-ken 3/8" Sq. Dr. Socket 21mm Nut Grip Length 29mm Front View

    Ko-ken 3/8" Sq. Dr. Socket 21mm Nut Grip Length 29mm
    No-Magnet Nut Retention That Actually Works

    No-Magnet Nut Retention That Actually Works

    Ko-ken’s Nut Grip design holds nuts and bolts in the socket without magnets—using a coil spring and ball bearings on opposing flats to keep the fastener in place while you start threads or work overhead. Perfect for those moments when a nut keeps falling out on the way in. Standard depth (29mm) keeps it compact for tight access while still giving solid engagement on 21mm hardware.

    Specs

    Spec

    Detail

    Brand

    Ko-ken

    Drive Size

    3/8"

    Drive Shape

    Square

    Socket Size

    1mm

    Type

    Nut Grip Socket

    Opening

    Nut Grip

    Overall Length

    29mm

    Dimensions (per drawing)

    1: 28mm; D2: 26mm; H: 12mm; L: 29mm

    UPC / Barcode

    4991644034703

    What This Tool Is For

    • Starting nuts/bolts where you can’t use your fingers to “hold it in place” (overhead, recessed pockets, awkward angles)
    • Non-magnetic retention needs (no magnets to collect metal dust/shavings or interfere with nearby components)
    • General 21mm service work on equipment, automotive, and shop jobs with a 3/8" ratchet

    Key Features That Matter

    • Holds fasteners without magnets (coil spring + ball bearings retention system)
    • Helps prevent dropped hardware while positioning and starting threads
    • Compact 29mm standard depth for better access in tighter areas

    How to Use (Quick Steps)

    1. Push the nut/bolt into the socket until it seats and you feel it retained.
    2. Start the fastener by hand if possible, then run it in with your ratchet.
    3. Once threaded, remove normally—the retention system keeps the hardware from falling out during positioning.

    In the Box

    • 1x Ko-ken 3/8" Drive 21mm Nut Grip Socket, 29mm length (3450M-21)

    Safety Notes

    • Wear approved eye protection.

    • California Proposition 65 warning applies (see P65Warnings.ca.gov).