McMaster-Carr logo
    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)
    190 Products

    Tube-Connecting Nuts

    Image of Product. Front orientation. Tube-Connecting Nuts.
    Create strong joints in metal and plastic round tubes. Clips on both ends grip the sides of the tube to hold the nut in place. A zinc plating provides corrosion resistance in wet environments.
    For Tube ID
    For
    OD
    Thread
    Size
    Lg.
    Retaining Clip
    Material
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
    0.53" to 0.54"5/8"1/4"-20
    		0.27"Steel500000000000000
    0.62" to 0.65"3/4"1/4"-20
    		0.23"Steel100000000000000
    0.62" to 0.65"3/4"5/16"-18
    		0.31"Steel100000000000000
    0.67" to 0.69"3/4"1/4"-20
    		0.23"Steel1000000000000000
    0.75" to 0.77"7/8"1/4"-20
    		0.23"Steel100000000000000
    0.78" to 0.83"1"1/4"-20
    		0.23"Steel50000000000000
    0.87" to 0.9"1"1/4"-20
    		0.23"Steel100000000000000
    0.87" to 0.9"1"5/16"-18
    		0.32"Steel100000000000000
    0.87" to 0.9"1"3/8"-16
    		0.4"Steel50000000000000
    1" to 1.02"1 1/8"1/4"-20
    		0.22"Steel50000000000000
    1.12" to 1.15"1 1/4"1/4"-20
    		0.2"Steel1000000000000000
    1.12" to 1.15"1 1/4"5/16"-18
    		0.4"Steel1000000000000000
    1.12" to 1.15"1 1/4"3/8"-16
    		0.4"Steel50000000000000
    1.25" to 1.27"1 3/8"1/4"-20
    		0.27"Steel50000000000000
    1.25" to 1.27"1 3/8"5/16"-18
    		0.24"Steel50000000000000
    1.37" to 1.4"1 1/2"1/4"-20
    		0.27"Steel50000000000000
    1.37" to 1.4"1 1/2"5/16"-18
    		0.41"Steel50000000000000
    1.62" to 1.65"1 3/4"1/4"-20
    		0.25"Steel50000000000000
    1.62" to 1.65"1 3/4"5/16"-18
    		0.27"Steel50000000000000
    1.87" to 1.9"2"1/4"-20
    		0.22"Steel500000000000000
    1.87" to 1.9"2"5/16"-18
    		0.4"Steel10000000000000
     

    Press-Fit Leveling Mount Inserts

    Slip these inserts into tubular legs to quickly add threads for attaching leveling mounts. They’re often used in the legs of light equipment and furniture.
    For Square Legs
    Image of ProductInUse. Front orientation. Leveling Mount Inserts. Press-Fit Leveling Mount Inserts, For Square Legs.
    Image of Attribute. Front orientation. Contains Annotated. Press-Fit Leveling Mount Inserts.
    Square inserts have flexible spring steel walls that grip the inside of the legs.
    For Leg
    Thread
    Outer
    Lg.
    Outer
    Wd.
    Inner
    Lg.
    Inner
    Wd.
    Cap. per
    Mount
    Overall
    Ht.
    Size
    Type
    Dp.
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
    1"1"15/16"15/16"Not Rated1 1/16"1/4"-20
    		UNC
    		1/4"4000000000000
    1"1"15/16"15/16"Not Rated1 1/16"5/16"-18
    		UNC
    		1/4"400000000000
    1"1"15/16"15/16"Not Rated1 1/16"3/8"-16
    		UNC
    		1/4"4000000000000
    1 1/4"1 1/4"1 3/16"1 3/16"Not Rated1 1/16"1/4"-20
    		UNC
    		1/4"4000000000000
    1 1/4"1 1/4"1 3/16"1 3/16"Not Rated1 1/16"5/16"-18
    		UNC
    		1/4"4000000000000
    1 1/4"1 1/4"1 3/16"1 3/16"Not Rated1 1/16"3/8"-16
    		UNC
    		1/4"4000000000000
    1 1/2"1 1/2"1 7/16"1 7/16"Not Rated1 1/16"3/8"-16
    		UNC
    		1/4"4000000000000
    1 1/2"1 1/2"1 7/16"1 7/16"Not Rated2 1/8"1/2"-13
    		UNC
    		1/2"100000000000
    1 3/4"1 3/4"1 11/16"1 11/16"Not Rated2 1/16"1/2"-13
    		UNC
    		1/2"1000000000000
    2"2"1 15/16"1 15/16"Not Rated2 1/16"1/2"-13
    		UNC
    		1/2"1000000000000
     
    For Round Legs
    Image of ProductInUse. Front orientation. Leveling Mount Inserts. Press-Fit Leveling Mount Inserts, For Round Legs.
    Image of Attribute. Front orientation. Contains Annotated.
    Retaining clips hold the round inserts inside the legs.
    For
    Leg
    Thread
    ID
    OD
    Cap. per
    Mount
    Overall
    Ht.
    Size
    Type
    Dp.
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
    11/16"3/4"Not Rated5/8"1/4"-20
    		UNC
    		3/8"4000000000000
    11/16"3/4"Not Rated5/8"5/16"-18
    		UNC
    		3/8"4000000000000
    15/16"1"Not Rated9/16"3/8"-16
    		UNC
    		3/8"4000000000000
    15/16"1"Not Rated5/8"1/4"-20
    		UNC
    		3/8"4000000000000
    15/16"1"Not Rated5/8"5/16"-18
    		UNC
    		3/8"4000000000000
    1 3/16"1 1/4"Not Rated5/8"1/4"-20
    		UNC
    		3/8"4000000000000
    1 3/16"1 1/4"Not Rated5/8"5/16"-18
    		UNC
    		3/8"4000000000000
    1 3/16"1 1/4"Not Rated5/8"3/8"-16
    		UNC
    		3/8"4000000000000
    1 7/16"1 1/2"Not Rated5/8"1/4"-20
    		UNC
    		3/8"4000000000000
    1 7/16"1 1/2"Not Rated5/8"5/16"-18
    		UNC
    		3/8"4000000000000
    1 7/16"1 1/2"Not Rated5/8"3/8"-16
    		UNC
    		3/8"4000000000000
    1 15/16"2"Not Rated3/8"3/8"-16
    		UNC
    		3/8"4000000000000
    1 15/16"2"Not Rated5/8"1/4"-20
    		UNC
    		3/8"4000000000000
    2 7/16"2 1/2"Not Rated5/8"3/8"-16
    		UNC
    		3/8"4000000000000
     

    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 3/8" OD Tubes
    0.058"10-32
    		1"Fully Threaded1"00000000000000
     
    For 1/2" OD Tubes
    0.058"1/4"-28
    		1"Fully Threaded1"0000000000000
    0.058"5/16"-24
    		1"Fully Threaded1"0000000000000
     
    For 5/8" OD Tubes
    0.058"5/16"-24
    		1"Partially Threaded3/4"0000000000000
    0.058"3/8"-24
    		1"Partially Threaded3/4"0000000000000
    0.058"7/16"-20
    		1"Fully Threaded1"0000000000000
     
    For 3/4" OD Tubes
    0.058"5/16"-24
    		1"Partially Threaded3/4"0000000000000
    0.058"3/8"-24
    		1"Fully Threaded1"0000000000000
    0.058"7/16"-20
    		1"Fully Threaded1"0000000000000
    0.065"5/16"-24
    		1 3/8"Partially Threaded7/8"0000000000000
    0.065"3/8"-24
    		1 3/8"Partially Threaded15/16"0000000000000
    0.065"7/16"-20
    		1 3/8"Partially Threaded1 1/8"0000000000000
     
    For 7/8" OD Tubes
    0.058"3/8"-24
    		1 3/8"Partially Threaded15/16"0000000000000
    0.058"7/16"-20
    		1 3/8"Partially Threaded1 1/8"0000000000000
    0.058"1/2"-20
    		1 3/8"Partially Threaded1 1/4"0000000000000
    0.065"3/8"-24
    		1 3/8"Partially Threaded15/16"0000000000000
    0.065"7/16"-20
    		1 3/8"Partially Threaded1"0000000000000
    0.065"1/2"-20
    		1 3/8"Partially Threaded1 1/4"0000000000000
    0.083"3/8"-24
    		1 1/2"Partially Threaded15/16"0000000000000
    0.083"7/16"-20
    		1 1/2"Partially Threaded1 1/8"0000000000000
    0.083"1/2"-20
    		1 1/2"Partially Threaded1 1/4"0000000000000
     
    For 1" OD Tubes
    0.058"3/8"-24
    		1 1/2"Partially Threaded15/16"0000000000000
    0.058"7/16"-20
    		1 1/2"Partially Threaded1"0000000000000
    0.058"1/2"-20
    		1 1/2"Partially Threaded1 1/4"0000000000000
    0.058"5/8"-18
    		1 1/2"Fully Threaded1 1/2"0000000000000
    0.065"3/8"-24
    		1 1/2"Partially Threaded15/16"0000000000000
    0.065"7/16"-20
    		1 1/2"Partially Threaded1"0000000000000
    0.065"1/2"-20
    		1 1/2"Partially Threaded1 1/4"0000000000000
    0.065"5/8"-18
    		1 1/2"Fully Threaded1 1/2"0000000000000
    0.083"3/8"-24
    		1 1/2"Partially Threaded15/16"0000000000000
    0.083"7/16"-20
    		1 1/2"Partially Threaded1"0000000000000
    0.083"1/2"-20
    		1 1/2"Partially Threaded1 1/4"0000000000000
    0.083"5/8"-18
    		1 1/2"Fully Threaded1 1/2"0000000000000
    0.095"3/8"-24
    		1 1/2"Partially Threaded15/16"0000000000000
    0.095"7/16"-20
    		1 1/2"Partially Threaded1"0000000000000
    0.095"1/2"-20
    		1 1/2"Partially Threaded1 1/4"0000000000000
    0.095"5/8"-18
    		1 1/2"Fully Threaded1 1/2"0000000000000
     
    For 1 1/8" OD Tubes
    0.058"1/2"-20
    		1 1/2"Partially Threaded1 1/4"0000000000000
    0.058"5/8"-18
    		1 1/2"Fully Threaded1 1/2"0000000000000
    0.065"1/2"-20
    		1 1/2"Partially Threaded1 1/4"0000000000000
    0.065"5/8"-18
    		1 1/2"Fully Threaded1 1/2"0000000000000
    0.083"1/2"-20
    		1 1/2"Partially Threaded1 1/4"0000000000000
    0.083"5/8"-18
    		1 1/2"Fully Threaded1 1/2"0000000000000
    0.083"3/4"-16
    		1 1/2"Fully Threaded1 1/2"0000000000000
    0.095"1/2"-20
    		1 1/2"Partially Threaded1 1/4"0000000000000
    0.095"5/8"-18
    		1 1/2"Fully Threaded1 1/2"0000000000000
    0.095"3/4"-16
    		1 1/2"Fully Threaded1 1/2"0000000000000
     
    For 1 1/4" OD Tubes
    0.095"5/8"-18
    		1 1/2"Fully Threaded1 1/2"00000000000000
    0.095"3/4"-16
    		1 1/2"Fully Threaded1 1/2"00000000000000
    0.12"5/8"-18
    		1 7/8"Partially Threaded1 9/16"00000000000000
    0.12"3/4"-16
    		1 7/8"Fully Threaded1 7/8"00000000000000
     
    For 1 3/8" OD Tubes
    0.095"5/8"-18
    		1 7/8"Partially Threaded1 9/16"00000000000000
    0.095"3/4"-16
    		1 7/8"Fully Threaded1 7/8"00000000000000
    0.12"5/8"-18
    		1 7/8"Partially Threaded1 9/16"00000000000000
    0.12"3/4"-16
    		1 7/8"Fully Threaded1 7/8"00000000000000
     
    For 1 1/2" OD Tubes
    0.095"5/8"-18
    		1 7/8"Partially Threaded1 9/16"00000000000000
    0.095"3/4"-16
    		1 7/8"Fully Threaded1 7/8"00000000000000
    0.12"3/4"-16
    		2"Partially Threaded1 7/8"00000000000000
    0.12"7/8"-14
    		2"Fully Threaded2"00000000000000
    0.25"3/4"-16
    		2"Fully Threaded2"00000000000000
    0.25"7/8"-14
    		2"Fully Threaded2"00000000000000
     
    For 1 3/4" OD Tubes
    0.12"3/4"-16
    		2"Fully Threaded2"00000000000000
    0.12"7/8"-14
    		2"Fully Threaded2"00000000000000
    0.12"1"-14
    		2"Fully Threaded2"00000000000000
    0.12"1 1/4"-12
    		2"Fully Threaded2"00000000000000
    0.25"3/4"-16
    		2"Partially Threaded1 7/8"00000000000000
    0.25"7/8"-14
    		2"Fully Threaded2"00000000000000
    0.25"1"-14
    		2"Fully Threaded2"00000000000000
     
    For 2" OD Tubes
    0.25"1 1/4"-12
    		3 1/4"Fully Threaded3 1/4"00000000000000
     

    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 3/8" OD Tubes
    0.058"10-32
    		1"Fully Threaded1"00000000000000
     
    For 1/2" OD Tubes
    0.058"1/4"-28
    		1"Fully Threaded1"0000000000000
    0.058"5/16"-24
    		1"Fully Threaded1"0000000000000
     
    For 5/8" OD Tubes
    0.058"5/16"-24
    		1"Partially Threaded3/4"0000000000000
    0.058"3/8"-24
    		1"Partially Threaded3/4"0000000000000
    0.058"7/16"-20
    		1"Fully Threaded1"0000000000000
     
    For 3/4" OD Tubes
    0.058"5/16"-24
    		1"Partially Threaded3/4"0000000000000
    0.058"3/8"-24
    		1"Fully Threaded1"0000000000000
    0.058"7/16"-20
    		1"Fully Threaded1"0000000000000
    0.065"5/16"-24
    		1 3/8"Partially Threaded7/8"0000000000000
    0.065"3/8"-24
    		1 3/8"Partially Threaded15/16"0000000000000
    0.065"7/16"-20
    		1 3/8"Partially Threaded1 1/8"0000000000000
     
    For 7/8" OD Tubes
    0.058"3/8"-24
    		1 3/8"Partially Threaded1"0000000000000
    0.058"7/16"-20
    		1 3/8"Partially Threaded1 1/8"0000000000000
    0.058"1/2"-20
    		1 3/8"Partially Threaded1 1/4"0000000000000
    0.065"3/8"-24
    		1 3/8"Partially Threaded1"0000000000000
    0.065"7/16"-20
    		1 3/8"Partially Threaded1"0000000000000
    0.065"1/2"-20
    		1 3/8"Partially Threaded1 1/4"0000000000000
    0.083"3/8"-24
    		1 1/2"Partially Threaded1"0000000000000
    0.083"7/16"-20
    		1 1/2"Partially Threaded1 1/8"0000000000000
    0.083"1/2"-20
    		1 1/2"Partially Threaded1 1/4"0000000000000
     
    For 1" OD Tubes
    0.058"3/8"-24
    		1 1/2"Partially Threaded1"0000000000000
    0.058"1/2"-20
    		1 1/2"Partially Threaded1 1/4"0000000000000
    0.058"5/8"-18
    		1 1/2"Fully Threaded1 1/2"0000000000000
    0.065"3/8"-24
    		1 1/2"Partially Threaded1"0000000000000
    0.065"7/16"-20
    		1 1/2"Partially Threaded1"0000000000000
    0.065"1/2"-20
    		1 1/2"Partially Threaded1 1/4"0000000000000
    0.065"5/8"-18
    		1 1/2"Fully Threaded1 1/2"0000000000000
    0.083"3/8"-24
    		1 1/2"Partially Threaded1"0000000000000
    0.083"1/2"-20
    		1 1/2"Partially Threaded1 1/4"0000000000000
    0.083"5/8"-18
    		1 1/2"Fully Threaded1 1/2"0000000000000
    0.095"3/8"-24
    		1 1/2"Partially Threaded1"0000000000000
    0.095"7/16"-20
    		1 1/2"Partially Threaded1"0000000000000
    0.095"1/2"-20
    		1 1/2"Partially Threaded1 1/4"0000000000000
    0.095"5/8"-18
    		1 1/2"Fully Threaded1 1/2"0000000000000
     
    For 1 1/8" OD Tubes
    0.058"1/2"-20
    		1 1/2"Partially Threaded1 1/4"0000000000000
    0.058"5/8"-18
    		1 1/2"Fully Threaded1 1/2"0000000000000
    0.065"1/2"-20
    		1 1/2"Partially Threaded1 1/4"0000000000000
    0.065"5/8"-18
    		1 1/2"Fully Threaded1 1/2"0000000000000
    0.083"5/8"-18
    		1 1/2"Fully Threaded1 1/2"0000000000000
    0.083"3/4"-16
    		1 1/2"Fully Threaded1 1/2"0000000000000
    0.095"1/2"-20
    		1 1/2"Partially Threaded1 1/4"0000000000000
    0.095"5/8"-18
    		1 1/2"Fully Threaded1 1/2"0000000000000
    0.095"3/4"-16
    		1 1/2"Fully Threaded1 1/2"0000000000000
     
    For 1 1/4" OD Tubes
    0.095"5/8"-18
    		1 1/2"Fully Threaded1 1/2"00000000000000
    0.095"3/4"-16
    		1 1/2"Fully Threaded1 1/2"00000000000000
    0.12"5/8"-18
    		1 7/8"Partially Threaded1 9/16"00000000000000
    0.12"3/4"-16
    		1 7/8"Fully Threaded1 7/8"00000000000000
     
    For 1 3/8" OD Tubes
    0.095"5/8"-18
    		1 7/8"Partially Threaded1 9/16"00000000000000
    0.095"3/4"-16
    		1 7/8"Fully Threaded1 7/8"00000000000000
    0.12"5/8"-18
    		1 7/8"Partially Threaded1 9/16"00000000000000
    0.12"3/4"-16
    		1 7/8"Fully Threaded1 7/8"00000000000000
     
    For 1 1/2" OD Tubes
    0.095"5/8"-18
    		1 7/8"Partially Threaded1 5/8"00000000000000
    0.095"3/4"-16
    		1 7/8"Fully Threaded1 7/8"00000000000000
    0.12"3/4"-16
    		2"Partially Threaded1 7/8"00000000000000
    0.25"3/4"-16
    		2"Fully Threaded2"00000000000000
    0.25"7/8"-14
    		2"Fully Threaded2"00000000000000
     
    For 1 3/4" OD Tubes
    0.12"3/4"-16
    		2"Fully Threaded2"00000000000000
    0.12"1"-14
    		2"Fully Threaded2"00000000000000
    0.12"1 1/4"-12
    		2"Fully Threaded2"00000000000000
    0.25"3/4"-16
    		2"Partially Threaded1 7/8"00000000000000
    0.25"7/8"-14
    		2"Fully Threaded2"00000000000000
    0.25"1"-14
    		2"Fully Threaded2"00000000000000
     
    For 2" OD Tubes
    0.25"1 1/4"-12
    		3 1/4"Fully Threaded3 1/4"00000000000000
     

    Weld-On Leveling Mount Inserts

    Weld these inserts to the end of tubular legs to attach threaded leveling mounts and casters. They create a more secure connection than press-fit inserts.
    For Square Legs
    Image of ProductInUse. Front orientation. Contains Annotated. Leveling Mount Inserts. Weld-On Leveling Mount Inserts, For Square Legs.
    For
    Leg
    Thread
    Outer
    Lg.
    Outer
    Wd.
    Cap. per
    Mount
    Ht.
    Size
    Type
    Each
    Steel
    1"1"Not Rated1/4"3/8"-16
    		UNC
    		0000000000000
    1"1"Not Rated1/4"1/2"-13
    		UNC
    		000000000000
    1"1"Not Rated1/4"5/8"-11
    		UNC
    		000000000000
    1"1"Not Rated1/4"3/4"-10
    		UNC
    		000000000000
    1 1/2"1 1/2"Not Rated1/4"3/8"-16
    		UNC
    		000000000000
    1 1/2"1 1/2"Not Rated1/4"1/2"-13
    		UNC
    		000000000000
    1 1/2"1 1/2"Not Rated1/4"5/8"-11
    		UNC
    		000000000000
    1 1/2"1 1/2"Not Rated1/4"3/4"-10
    		UNC
    		000000000000
    2"2"Not Rated1/4"3/8"-16
    		UNC
    		000000000000
    2"2"Not Rated1/4"1/2"-13
    		UNC
    		000000000000
    2"2"Not Rated1/4"5/8"-11
    		UNC
    		000000000000
    2"2"Not Rated1/4"3/4"-10
    		UNC
    		000000000000
     
    back to top