McMaster-Carr logo
    Filter by
    Socket Type
    Socket Style
    System of Measurement
    Square Drive Size
    Attribute Image
    Container Type
    Bolt Clearance Type
    Number of Pieces
    Set Type
    Drive Type
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    DFARS Specialty Metals
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Nut Clearance Depth
    Sold As
    Material
    Compatible Retaining Ring ID
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    11 Products

    Wheel Bearing Locknut Socket Sets

    Shaped and sized for compatibility with wheel bearing locknuts on trucks and trailers, the sockets in these sets make it easy to install and remove locknuts. They ensure the proper torque setting when you reinstall a locknut on your wheel, so you know it's safe and secure. These are square drive sockets for use with hand-driven tools, not impact wrenches. Made of steel, they grip locknuts tightly and prevent rounding.
    Sockets—Chrome-Plated Steel
    Image of Product. Front orientation. Sockets. Wheel Bearing Locknut Socket Sets, Sockets—Chrome-Plated Steel, Plastic Case.

    Plastic Case

    Image of Specification. 4-Pin. Front orientation. 4-Pin Socket. Wheel Bearing Locknut Socket Sets.

    4-Pin

    Image of Specification. 6-Pin. Front orientation. 6-Pin Socket. Wheel Bearing Locknut Socket Sets.

    6-Pin

    Spindle Puller Adapter—Spindle puller adapters remove the front spindle on four-wheel drive trucks so you can access the needle bearing when lubricating and aligning the front wheels.
    Plastic Case—Carry sets with a plastic case from one location to the next.
    4-Pin Socket and 6-Pin Socket—4-pin and 6-pin sockets fit around retaining locknuts with slots or holes in the side. Also known as spanner sockets, they’re similar to tri-groove sockets but have four or six pins instead of three.
    No. of
    Pieces
    Components Included
    Includes
    Container
    Type
    Socket
    Shape
    Drive Size
    Each
    1/2" Square Drive
    61 Adapter
    5 Sockets    		4-Pin: 2", 2 1/4", 2 3/4"
    6-Pin: 2 1/4"
    Spindle Puller Adapter     		Plastic Case4-Pin, 6-Pin2", 2 1/4", 2 5/16", 2 3/4"99939A1200000000
     

    6-Point Impact Sockets

    Achieve the best possible grip on hex fasteners and prevent rounding. These sockets are made to withstand the high torque and force of impact tools.
    Standard Clearance
    Image of Product. Front orientation. Sockets. 6-Point Impact Sockets, Standard Clearance.
    Image of Attribute. Front orientation. Contains Annotated. 6-Point Impact Sockets.
    Image of Specification. Front orientation. 6-Point Socket.

    6-Point

    Socket

    3/4" Square Drive and 1" Square Drive—3/4", 1", and 1 1/2" square drive size sockets require a locking retainer. Use with an impact wrench that has a pin-style socket retainer, or use a socket retaining ring with tools that have a hole- or hole-and-ring style socket retainer.
    Sockets
    Retaining Rings
    Clearance
    Dp.
    Drive
    Size
    Nut
    Bolt
    Compatible Retaining
    Ring ID
    Material
    Overall
    Lg.
    Socket
    Shape
    Each
    Each
    3/4" Square Drive
    2 5/16"1 1/2"1 15/16"1 5/8"Black-Oxide Steel3 5/16"6-Point5552A540000005552A3800000
     
    1" Square Drive
    2 5/16"1 3/8"2 3/32"2 1/4"Black-Oxide Steel3 3/16"6-Point5550A194000005550A1380000
     
    Deep Clearance
    Image of Product. Front orientation. Sockets. 6-Point Impact Sockets, Deep Clearance.
    Image of Attribute. Front orientation. Contains Annotated. 6-Point Impact Sockets.
    Image of Specification. Front orientation. 6-Point Socket.

    6-Point

    Socket

    3/4" Square Drive and 1" Square Drive—3/4", 1", and 1 1/2" square drive size sockets require a locking retainer. Use with an impact wrench that has a pin-style socket retainer, or use a socket retaining ring with tools that have a hole- or hole-and-ring style socket retainer.
    Sockets
    Retaining Rings
    Clearance
    Dp.
    Drive
    Size
    Nut
    Bolt
    Compatible Retaining
    Ring ID
    Material
    Overall
    Lg.
    Socket
    Shape
    Each
    Each
    3/4" Square Drive
    2 5/16"2 1/2"3 19/64"1 3/4"Black-Oxide Steel4 1/4"6-Point5552A490000005552A18100000
     
    1" Square Drive
    2 5/16"1 11/32"1 23/32"2 1/8"Black-Oxide Steel5"6-Point5550A1350000005550A620000
     

    12-Point Sockets

    The 12-point shape quickly positions on hex fasteners. These sockets are for hand-driven use only.
    Chrome-Plated Steel
    Image of Product. Front orientation. Sockets. 12-Point Sockets, Chrome-Plated Steel, Standard Clearance.
    Image of Specification. Front orientation. 12-Point Socket.

    Standard

    Clearance

    12-Point

    Socket

    Standard Clearance
    Drive
    Size
    OD
    Socket
    Shape
    For Drive Style
    Overall
    Lg.
    Each
    3/4" Square Drive
    2 5/16"3 1/4"12-PointExternal 12-Point, External Hex
    		3 1/2"5547A42000000
     
    1" Square Drive
    2 5/16"3 11/64"12-PointExternal 12-Point, External Hex
    		3 5/16"5546A63000000
     
    back to top