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)
    79 Products

    Hex Nuts
    3D CAD models available

    Image of Product. Front orientation. Hex Nuts. Hex Nuts.
    The most commonly used hex nuts, these are suitable for fastening most machinery and equipment.
    Corrosion-Resistant Stainless Steel
    18-8 Stainless Steel—The choice for wet and outdoor environments, these nuts resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.
    Thread
    Size
    Wd.
    Ht.
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
    0000-160
    		1/16"1/32"1000000000000000
    000-120
    		5/64"1/32"500000000000000
    00-90
    		5/64"3/64"500000000000000
     
    Brass
    Brass—Conductive and nonmagnetic, brass nuts are commonly used to secure electrical equipment, such as circuit board assemblies and mounting brackets, inside enclosures. They're also softer than most metals, so they won't damage other fastening components.
    Thread
    Size
    Wd.
    Ht.
    Pkg.
    Qty.
    Pkg.
    Brass
    000-120
    		5/64"1/32"10000000000000000
    00-90
    		5/64"3/64"1000000000000000
    00-96
    		5/64"3/64"10000000000000
     

    Narrow-Profile Hex Nuts
    3D CAD models available

    Image of Product. Bottom orientation. Hex Nuts. Narrow-Profile Hex Nuts.
    When you have limited space for tightening with a wrench, use these nuts. Since they’re about 20% narrower, they fit in tight spots where standard-profile nuts won't fit. Also known as small-pattern hex nuts.
    Steel
    Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.
    Black-Oxide Steel—Typically chosen for their appearance, these nuts have a dark, matte coating to create a finished look. They offer minimal corrosion resistance, so they're best for dry environments.
    Steel—Best for dry environments since moisture will cause these nuts to rust.
    Thread
    Size
    Wd.
    Ht.
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
    4-40
    		3/16"1/16"10000000000000000
    5-40
    		1/4"3/32"1000000000000000
    6-32
    		1/4"3/32"1000000000000000
    8-32
    		1/4"3/32"1000000000000000
    8-32
    		5/16"7/64"1000000000000000
    10-24
    		1/4"3/32"500000000000000
    10-24
    		5/16"7/64"1000000000000000
    10-32
    		1/4"3/32"1000000000000000
    10-32
    		5/16"7/64"1000000000000000
     
    Black-Oxide Steel
    4-40
    		3/16"1/16"1000000000000000
    6-32
    		1/4"3/32"1000000000000000
    8-32
    		1/4"3/32"1000000000000000
    10-24
    		5/16"7/64"1000000000000000
    10-32
    		5/16"7/64"1000000000000000
     
    Steel
    4-40
    		3/16"1/16"1000000000000000
     
    Corrosion-Resistant Stainless Steel
    18-8 Stainless Steel—The choice for wet and outdoor environments, these nuts resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.
    Black-Oxide 18-8 Stainless Steel—Typically chosen for their appearance, these nuts have a dark, matte coating to create a finished look. They resist rust in wet and outdoor environments, but won't hold up to the harsh chemicals that 316 stainless steel can.
    Super-Corrosion-Resistant 316 Stainless Steel—Superior to 18-8 stainless steel, these nuts won't degrade when exposed to harsh weather, salt water, and most chemicals.
    Super-Corrosion-Resistant Black-Oxide 316 Stainless Steel—Combines a finished appearance with the rust resistance of 316 stainless steel. Even if the coating wears off, these nuts will hold up in just about any environment, including salt water and most chemicals.
    Thread Size
    Wd.
    Ht.
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
    0-80
    		1/8"3/64"5000000000000000
    1-64
    		1/8"3/64"500000000000000
    1-72
    		7/64"1/16"500000000000000
    2-56
    		5/32"1/16"1000000000000000
    4-40
    		3/16"1/16"1000000000000000
    5-40
    		1/4"3/32"1000000000000000
    6-32
    		1/4"3/32"1000000000000000
    8-32
    		1/4"3/32"1000000000000000
    8-32
    		5/16"7/64"1000000000000000
    10-24
    		5/16"7/64"1000000000000000
    10-24
    		11/32"1/8"10000000000000000
    10-32
    		5/16"7/64"1000000000000000
    10-32
    		11/32"1/8"10000000000000000
     
    Black-Oxide 18-8 Stainless Steel
    0-80
    		1/8"3/64"500000000000000
    4-40
    		3/16"1/16"1000000000000000
    6-32
    		1/4"3/32"10000000000000000
    8-32
    		1/4"3/32"10000000000000000
    8-32
    		5/16"7/64"10000000000000000
    10-24
    		5/16"7/64"10000000000000000
    10-32
    		5/16"7/64"10000000000000000
     
    Super-Corrosion-Resistant 316 Stainless Steel
    4-40
    		3/16"1/16"10000000000000
    5-40
    		1/4"3/32"10000000000000
    6-32
    		1/4"3/32"10000000000000
    8-32
    		1/4"3/32"5000000000000000
    8-32
    		5/16"7/64"10000000000000
    10-24
    		1/4"3/32"10000000000000
    10-24
    		5/16"7/64"5000000000000000
    10-24
    		11/32"1/8"10000000000000
    10-32
    		1/4"3/32"10000000000000
    10-32
    		5/16"7/64"5000000000000000
    10-32
    		11/32"1/8"10000000000000
    M3 × 0.5 mm5 mm1.7 mm10000000000000
    M3.5 × 0.6 mm5.5 mm2.5 mm10000000000000
    M4 × 0.7 mm5.5 mm2.5 mm10000000000000
    M4 × 0.7 mm7 mm2.9 mm10000000000000
    M5 × 0.8 mm7 mm2.5 mm10000000000000
    M5 × 0.8 mm7.5 mm2.9 mm10000000000000
     
    Super-Corrosion-Resistant Black-Oxide 316 Stainless Steel
    M3 × 0.5 mm5 mm1.7 mm10000000000000
    M4 × 0.7 mm5.5 mm2.5 mm10000000000000
    M4 × 0.7 mm7 mm2.9 mm10000000000000
    M5 × 0.8 mm7 mm2.5 mm10000000000000
     
    Brass
    Brass—Conductive and nonmagnetic, brass nuts are commonly used to secure electrical equipment, such as circuit board assemblies and mounting brackets, inside enclosures. They're also softer than most metals, so they won't damage other fastening components.
    Thread
    Size
    Wd.
    Ht.
    Pkg.
    Qty.
    Pkg.
    Brass
    0-80
    		3/32"3/64"10000000000000000
    1-72
    		7/64"1/16"1000000000000000
    2-56
    		1/8"5/64"1000000000000000
    2-56
    		5/32"1/16"1000000000000000
    4-40
    		3/16"1/16"1000000000000000
    6-32
    		1/4"3/32"1000000000000000
    8-32
    		1/4"3/32"1000000000000000
    8-32
    		5/16"7/64"1000000000000000
    10-24
    		5/16"7/64"1000000000000000
    10-24
    		11/32"1/8"10000000000000000
    10-32
    		5/16"7/64"1000000000000000
     

    Mil. Spec. Narrow-Profile Hex Nuts
    3D CAD models available

    Image of Product. Bottom orientation. Hex Nuts. Mil. Spec. Narrow-Profile Hex Nuts.
    These nuts are manufactured and tested to strict U.S. military standards for material and construction. They are about 20% narrower to fit in tight spots where standard-profile nuts won't fit. Also known as small-pattern hex nuts.
    Corrosion-Resistant Stainless Steel
    18-8 Stainless Steel—The choice for wet and outdoor environments, these nuts resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.
    Thread
    Size
    Wd.
    Ht.
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
    0-80
    		1/8"3/64"Fed. Spec. FF-N-836, NAS671C010000000000000000
    2-56
    		5/32"1/16"Fed. Spec. FF-N-836, NAS671C21000000000000000
    4-40
    		3/16"1/16"Fed. Spec. FF-N-836, NAS671C41000000000000000
    6-32
    		1/4"3/32"Fed. Spec. FF-N-836, NAS671C61000000000000000
    8-32
    		5/16"7/64"Fed. Spec. FF-N-836, NAS671C81000000000000000
    10-32
    		11/32"1/8"Fed. Spec. FF-N-836, NAS671C10500000000000000
     
    back to top