McMaster-Carr logo
    Filter by
    Product Family
    System of Measurement
    For Tube Wall Thickness
    Attribute Image
    Thread Direction
    Industrial Info Compare
    Weld Nut Shape
    Thread Type
    Width
    Thread Spacing
    Industrial Info Snippet
    Number of Projections
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Industrial Info Snippet
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    DFARS Specialty Metals
    Industrial Info Compare
    Thread Length
    Attribute Image
    Hole Diameter
    Collar Diameter
    Collar Height
    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)
    23 Products

    Weld Nut Shape

    Nut Type

    Performance

    Square Weld Nuts

    Image of Product. Bottom orientation. Weld Nuts. Square Weld Nuts.
    Image of Product. Bottom orientation. Weld Nuts. Square Weld Nuts.
    With four symmetrical projections, these nuts create the strongest hold in our offering. Unlike rectangular weld nuts, each projection is equidistant from the threads, so welds wrap evenly for extra strength and twist resistance. Projections concentrate heat away from the threads to prevent them from deforming and create consistent welds. All nuts have a collar pilot that guides them into the hole, holds them in place while welding, and protects the threads from weld spatter.
    Steel—Best for dry environments since moisture will cause them to rust. Made of uncoated steel, these nuts require minimal prep. Weld them to uncoated steel surfaces.
    Collar
    Thread
    Size
    Wd.
    Ht.
    Dia.
    Ht.
    For Hole
    Dia.
    Specs.
    Met
    Certificate Type
    Pkg.
    Qty.
    Pkg.
    Steel
    1/2"-20
    		13/16"3/8"23/32"0.063"47/64"ASME B1.1Material Certificate
    		2593975A420000000
    1/2"-20
    		13/16"3/8"23/32"0.094"47/64"ASME B1.1—1093975A11600000
     

    Left-Hand-Thread Tube End Weld Nuts

    Image of Product. Bottom orientation. Weld Nuts. Left-Hand-Thread Tube End Weld Nuts.
    Image of Product. Bottom orientation. Weld Nuts. Left-Hand-Thread Tube End Weld Nuts.
    These weld nuts prevent fasteners from backing out of assemblies that rotate counterclockwise. Their left-hand threads pair with left-hand screws and rods to stop the fastener from loosening as the assembly turns. Weld them to the end of a tube for a stronger connection than tapping the tube directly. Also known as tube adapters and weldable threaded tube ends.
    For Tube
    Wall Thk.
    Thread
    Size
    Ht.
    Threading
    Thread
    Lg.
    Each
    4130 Alloy Steel
     
    For 7/8" OD Tubes
    0.058"1/2"-20
    		1 3/8"Partially Threaded1 1/4"94640A16400000
    0.065"1/2"-20
    		1 3/8"Partially Threaded1 1/4"94640A2020000
    0.083"1/2"-20
    		1 1/2"Partially Threaded1 1/4"94640A2050000
     
    For 1" OD Tubes
    0.058"1/2"-20
    		1 1/2"Partially Threaded1 1/4"94640A2240000
    0.065"1/2"-20
    		1 1/2"Partially Threaded1 1/4"94640A2440000
    0.083"1/2"-20
    		1 1/2"Partially Threaded1 1/4"94640A2690000
    0.095"1/2"-20
    		1 1/2"Partially Threaded1 1/4"94640A2890000
     
    For 1 1/8" OD Tubes
    0.058"1/2"-20
    		1 1/2"Partially Threaded1 1/4"94640A3050000
    0.065"1/2"-20
    		1 1/2"Partially Threaded1 1/4"94640A3070000
    0.095"1/2"-20
    		1 1/2"Partially Threaded1 1/4"94640A4030000
     

    Tube End Weld Nuts

    Image of Product. Bottom orientation. Weld Nuts. Tube End Weld Nuts.
    Image of Product. Bottom orientation. Weld Nuts. Tube End Weld Nuts.
    Weld these nuts into tube ends to attach threaded fittings such as rod ends. The welded connection is stronger than tapping a tube directly. These nuts are often used to link control arms and suspensions. Also known as tube adapters and weldable threaded tube ends.
    For Tube
    Wall Thk.
    Thread
    Size
    Ht.
    Threading
    Thread
    Lg.
    Each
    4130 Alloy Steel
     
    For 7/8" OD Tubes
    0.058"1/2"-20
    		1 3/8"Partially Threaded1 1/4"94640A16000000
    0.065"1/2"-20
    		1 3/8"Partially Threaded1 1/4"94640A2800000
    0.083"1/2"-20
    		1 1/2"Partially Threaded1 1/4"94640A3300000
     
    For 1" OD Tubes
    0.058"1/2"-20
    		1 1/2"Partially Threaded1 1/4"94640A2200000
    0.065"1/2"-20
    		1 1/2"Partially Threaded1 1/4"94640A2400000
    0.083"1/2"-20
    		1 1/2"Partially Threaded1 1/4"94640A2650000
    0.095"1/2"-20
    		1 1/2"Partially Threaded1 1/4"94640A2850000
     
    For 1 1/8" OD Tubes
    0.058"1/2"-20
    		1 1/2"Partially Threaded1 1/4"94640A4700000
    0.065"1/2"-20
    		1 1/2"Partially Threaded1 1/4"94640A4900000
    0.083"1/2"-20
    		1 1/2"Partially Threaded1 1/4"94640A5300000
    0.095"1/2"-20
    		1 1/2"Partially Threaded1 1/4"94640A5800000
     
    back to top