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)
    31 Products

    Mil. Spec. Rivet-Mount Nuts

    Image of ProductInUse. Front orientation. Contains Annotated. Rivet-Mount Nuts.
    Image of Product. Front orientation. Rivet-Mount Nuts.
    Image of Attribute. Front orientation. Contains Annotated.
    Image of Attribute. Top orientation. Contains Annotated.
    Create threads in hard-to-work areas—where you can’t reach the back of a workpiece, or material is too thin to be tapped. For a strong grip, these rivet-mount nuts have distorted threads that increase friction with bolts. Because they mount with two rivets, they won’t spin when you’re tightening screws. However, these nuts do move inside their retainers, which lets you install bolts at a slight angle; use them to align with off-center parts. All meet military guidelines for dimensions and material.
    A286 Stainless Steel—A286 stainless steel nuts are corrosion resistant.
    Cadmium-Plated Carbon Steel—Cadmium-plated nuts resist corrosion in industrial and saltwater environments, although will lose their corrosion resistance over 450° F. The cadmium plating also adds lubricity, making these nuts easy to install.
    Lubricated—Lubricated nuts thread onto bolts smoothly.
    Base
    Barrel
    Mounting
    Thread
    Size
    Lg.
    Wd.
    Thk.
    Dia.
    Ht.
    No. of
    Holes
    Hole
    Dia.
    Hole
    Ctr.-to-Ctr.
    Mil.
    Spec.
    Each
    Cadmium-Plated Carbon Steel—Lubricated
    3/8"-24
    		1 19/64"43/64"1/16"0.453"19/64"20.13"1"MS21059L6000000000000000
     
    A286 Stainless Steel—Lubricated
    3/8"-24
    		1 19/64"43/64"1/16"0.453"19/64"20.13"1"MS21060L600000000000000
     

    Low-Profile Rectangular Weld Nuts

    Image of Product. Bottom orientation. Weld Nuts. Low-Profile Rectangular Weld Nuts.
    Image of Product. Bottom orientation. Weld Nuts. Low-Profile Rectangular Weld Nuts.
    Weld permanent threads in channels and other tight spaces without adding a barrel bump that gets in the way. These nuts have a short barrel that tucks under low surfaces and a slim footprint that fits between narrow channel walls.
    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.
    18-8 Stainless Steel—Suitable for outdoor use, these nuts resist rust from water and mild chemicals. Weld them to stainless steel surfaces.
    Number of Projections—More projections lead to more consistent welds by concentrating heat and protecting the threads from deforming.
    Base
    Barrel
    Thread
    Size
    No. of
    Projections
    Lg.
    Wd.
    Thk.
    Dia.
    Ht.
    For Hole
    Dia.
    Pkg.
    Qty.
    Pkg.
    Steel
    3/8"-24
    		263/64"5/8"9/64"7/16"3/32"7/16"1000000000000000
     
    18-8 Stainless Steel
    3/8"-24
    		263/64"5/8"9/64"7/16"3/32"7/16"50000000000000
     

    Self-Aligning Rectangular Weld Nuts

    Image of Product. Bottom orientation. Weld Nuts. Self-Aligning Rectangular Weld Nuts.
    Image of Product. Bottom orientation. Weld Nuts. Self-Aligning Rectangular Weld Nuts.
    Help screws pass through perfectly every time. These nuts float inside a rectangular retainer that shifts and tilts to compensate for misalignment. A pilot tip locates the hole, and the retainer holds the nut in place during welding.
    Steel with Steel Retainer—Best for dry environments since moisture will create rust. Weld them to steel surfaces.
    Base
    Thread
    Size
    Lg.
    Wd.
    Thk.
    Ht.
    Pkg.
    Qty.
    Pkg.
    Steel with Steel Retainer
    3/8"-24
    		2"25/32"1/16"33/64"5000000000000000
     

    Weld Nuts

    Image of Product. Bottom orientation. Weld Nuts. Weld Nuts.
    Image of Product. Bottom orientation. Weld Nuts. Weld Nuts.
    Add permanent threads to thin metal with our go-to weld nuts. Unlike press-fit and rivet nuts, these nuts fuse to the base metal, so they won’t twist and pull out. Three evenly spaced projections concentrate heat away from the threads to prevent them from deforming and create consistent welds. All have a collar pilot that guides the nut into the hole, holds it in place while welding, and protects the threads from weld spatter. You can also install them on thick pieces of metal.
    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
    Pkg.
    Qty.
    Pkg.
    Steel
    3/8"-24
    		5/8"1/4"17/32"0.05"35/64"ASME B1.125000000000000000
     

    Offset-Barrel Low-Profile Rectangular Weld Nuts

    Image of Product. Bottom orientation. Weld Nuts. Offset-Barrel Low-Profile Rectangular Weld Nuts.
    Image of Product. Bottom orientation. Weld Nuts. Offset-Barrel Low-Profile Rectangular Weld Nuts.
    Add permanent threads on corners and near edges. With a slim base and a short, offset barrel, these weld nuts fit in tight spaces such as channels and low-clearance areas.
    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.
    Zinc-Plated Steel—A step up from plain steel, these nuts withstand occasional exposure to moisture. Weld them to uncoated steel surfaces. If MIG or TIG welding, grind the zinc plating off the part of the nut you intend to weld.
    18-8 Stainless Steel—Suitable for outdoor use, these nuts resist rust from water and mild chemicals. Weld them to stainless steel surfaces.
    Base
    Barrel
    Thread
    Size
    Lg.
    Wd.
    Thk.
    Dia.
    Ht.
    For Hole
    Dia.
    Pkg.
    Qty.
    Pkg.
    Steel
    3/8"-24
    		1 1/8"5/8"9/64"7/16"3/32"29/64"25000000000000000
     
    Zinc-Plated Steel
    3/8"-24
    		1 1/8"5/8"9/64"7/16"3/32"29/64"100000000000000
     
    18-8 Stainless Steel
    3/8"-24
    		1 1/8"5/8"9/64"7/16"3/32"29/64"50000000000000
     

    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 5/8" OD Tubes
    0.058"3/8"-24
    		1"Partially Threaded3/4"00000000000000
     
    For 3/4" OD Tubes
    0.058"3/8"-24
    		1"Fully Threaded1"0000000000000
    0.065"3/8"-24
    		1 3/8"Partially Threaded15/16"0000000000000
     
    For 7/8" OD Tubes
    0.058"3/8"-24
    		1 3/8"Partially Threaded15/16"0000000000000
    0.065"3/8"-24
    		1 3/8"Partially Threaded15/16"0000000000000
    0.083"3/8"-24
    		1 1/2"Partially Threaded15/16"0000000000000
     
    For 1" OD Tubes
    0.058"3/8"-24
    		1 1/2"Partially Threaded15/16"0000000000000
    0.065"3/8"-24
    		1 1/2"Partially Threaded15/16"0000000000000
    0.083"3/8"-24
    		1 1/2"Partially Threaded15/16"0000000000000
    0.095"3/8"-24
    		1 1/2"Partially Threaded15/16"0000000000000
     

    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
    Pkg.
    Qty.
    Pkg.
    Steel
    3/8"-24
    		5/8"1/4"17/32"0.062"35/64"ASME B1.125000000000000000
    3/8"-24
    		5/8"1/4"17/32"0.063"35/64"ASME B1.15000000000000000
     

    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 5/8" OD Tubes
    0.058"3/8"-24
    		1"Partially Threaded3/4"00000000000000
     
    For 3/4" OD Tubes
    0.058"3/8"-24
    		1"Fully Threaded1"0000000000000
    0.065"3/8"-24
    		1 3/8"Partially Threaded15/16"0000000000000
     
    For 7/8" OD Tubes
    0.058"3/8"-24
    		1 3/8"Partially Threaded1"0000000000000
    0.065"3/8"-24
    		1 3/8"Partially Threaded1"0000000000000
    0.083"3/8"-24
    		1 1/2"Partially Threaded1"0000000000000
     
    For 1" OD Tubes
    0.058"3/8"-24
    		1 1/2"Partially Threaded1"0000000000000
    0.065"3/8"-24
    		1 1/2"Partially Threaded1"0000000000000
    0.083"3/8"-24
    		1 1/2"Partially Threaded1"0000000000000
    0.095"3/8"-24
    		1 1/2"Partially Threaded1"0000000000000
     
    back to top