McMaster-Carr logo
    Filter by
    Ball Diameter
    Tongue Width
    Mount Type
    For Maximum Trailer Weight
    Mounting Hole Center-to-Center
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    DFARS Specialty Metals
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Mounting Hole Diameter
    Maximum Shackle Diameter
    Number of Positions
    Height Adjustment Increments
    Body Material
    Body Finish
    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)
    10 Products

    Hitch-Ball Couplers

    For an easy towing hookup, bolt or weld these couplers to a trailer. They connect to the hitch ball on a vehicle and secure with a lever latch. Maximum trailer weight is the total weight being towed.
    Bolt On—Straight
    Image of Product. Front orientation. Contains Annotated. Hitch-Ball Couplers. Bolt On—Straight.
    Straight couplers bolt to a single-channel trailer tongue.
    Lockable Lever and Lockable Lever with Pin—Couplers with a lockable lever help prevent accidental uncoupling while driving. They have a hole in the latch, so you can secure it with a pin, padlock, or coupler lock (sold separately). Some couplers include a pin.
    Couplers
    Coupler Locks
    Overall
    Mounting
    Hole
    For Max. Trailer
    Wt., lb.
    For Tongue
    Wd.
    For Ball
    Dia.
    Lg.
    Wd.
    Ht.
    Mounting Fasteners
    Included
    Dia.
    Ctr.-to-Ctr.
    Features
    For Max. Shackle
    Dia.
    Specs.
    Met
    Each
    Each
    3,5002"2"11"4"4 1/8"No1/2"3 1/16"Lockable Lever5/16"SAE J6842743T60000002743T8000000
    3,5003"2"10 7/8"4 1/4"4 1/8"No1/2"3 1/16"Lockable Lever5/16"SAE J6842743T5000002743T800000
    6,0003"2"10 3/8"3 3/4"4 1/8"No1/2"3"Lockable Lever with Pin5/16"SAE J6842743T21000002743T800000
    Bolt On—Height Adjusting
    Image of Product. Front orientation. Hitch-Ball Couplers. Bolt On—Height Adjusting.
    Image of Attribute. Front orientation. Contains Annotated. Height Adjusting.
    Height-adjusting couplers raise and lower to match the height of your hitch ball and level your trailer. This distributes the load on your tires better than straight or A-frame couplers. A spring-loaded latch on these couplers automatically opens and closes around the ball.
    Lockable Lever with Pin—Couplers with a lockable lever help prevent accidental uncoupling while driving. They have a hole in the latch, so you can secure it with a pin, padlock, or coupler lock (sold separately). Some couplers include a pin.
    Overall
    Mounting
    Hole
    For Max. Trailer
    Wt., lb.
    For Ball
    Dia.
    No. of
    Positions
    Ht. Adjustment
    Increments
    Lg.
    Wd.
    Ht.
    Mounting Fasteners
    Included
    Dia.
    Ctr.-to-Ctr.
    Features
    For Max. Shackle
    Dia.
    Each
    10,0002"32"10"3 1/4"7 5/8"No5/8"5"Lockable Lever with Pin, Spring-Loaded Latch5/16"2743T1110000000
    10,0002"52"10"3 1/4"11 5/8"No5/8"9"Lockable Lever with Pin, Spring-Loaded Latch5/16"2743T113000000
    Weld On—A-Frame
    Image of Product. Front orientation. Hitch-Ball Couplers. Weld On—A-Frame.
    A-frame couplers weld onto a two-channel trailer tongue set at a 50° angle.
    Lockable Lever—Couplers with a lockable lever help prevent accidental uncoupling while driving. They have a hole in the latch, so you can secure it with a pin, padlock, or coupler lock (sold separately). Some couplers include a pin.
    Couplers
    Coupler Locks
    Overall
    For Max. Trailer
    Wt., lb.
    For Ball
    Dia.
    Lg.
    Wd.
    Ht.
    Features
    Specs.
    Met
    Each
    Each
    5,0002"13 5/8"9 1/4"4 7/8"Lockable LeverSAE J6842743T130000002743T8000000

    Hitch-Ball Coupler Locks

    Image of Product. Back orientation. Hitch-Ball Coupler Locks. Style B.
    Image of Product. Front orientation. Hitch-Ball Coupler Locks. Style C.

    Style B

    Style C

    Insert these locks into the hitch-ball coupler latch or socket on your trailer to prevent theft. Each lock is plated or powder-coated to stand up to weather, so you can use them on outdoor trailers without worrying about corrosion.
    Style B
    Image of ProductInUse. Front orientation. Hitch-Ball Coupler Locks. Style B.
    Image of Product. Back orientation. Hitch-Ball Coupler Locks. Style B.
    Style B locks block access to the socket, so no one can hitch your trailer without the key. These locks are a good choice when your trailer is unhitched from your vehicle, such as during drop-offs or while in storage. They are one piece and compact for easy installation and storage. Made of aluminum, they resist corrosion better than steel locks.
    Keyed Differently—Choose keyed differently locks if you need locks that each open with a different key.
    Keying
    For Ball Dia.
    Ht.
    Wd.
    Dp.
    No. of Keys
    Included
    Each
    Solid Powder-Coated Aluminum Body
     
    Red Body
    Keyed Differently1 7/8", 2", 2 5/16"4 5/8"3 1/4"3 3/4"26965N11000000
     
    Style C
    Image of ProductInUse. Front orientation. Hitch-Ball Coupler Locks. Style C.
    Image of Product. Front orientation. Hitch-Ball Coupler Locks. Style C.
    Style C locks block access to the socket, so no one can hitch your trailer without the key. These locks are a good choice when your trailer is unhitched from your vehicle, such as during drop-offs or while in storage. They can also be used on ring-type hitches. Made of two hardened steel pieces, they’re heavy duty and stand up to attempts to cut them open better than aluminum locks.
    Keyed Alike—Choose keyed alike locks if you need several locks that open with the same key.
    Keyed Differently—Choose keyed differently locks if you need locks that each open with a different key.
    Keying
    For Ball Dia.
    Ht.
    Wd.
    Dp.
    No. of Keys
    Included
    Key
    No.
    Each
    Solid Hardened Powder-Coated Steel Body
     
    Red Body
    Keyed Alike1 7/8", 2", 2 5/16"7"5"6"2461576965N120000000
    Keyed Differently1 7/8", 2", 2 5/16"7"5"6"2—6965N13000000
     
    back to top