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)
    Help me decide (beta)
    99 Products

    Hex Nuts

    The most commonly used hex nuts, these are suitable for fastening most machinery and equipment.
    Corrosion-Resistant Stainless Steel
    Image of Product. Front orientation. Hex Nuts. Hex Nuts.
    Image of Specification. Front orientation. Hex Nuts. Hex Nuts.
    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.
    Certificate Type
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
    1/4"-32
    		7/16"7/32"—195621A10000000
    5/16"-32
    		1/2"17/64"Material Certificate
    		195621A2000000
    3/8"-32
    		9/16"21/64"Material Certificate
    		195621A3000000
    7/16"-28
    		11/16"3/8"Material Certificate
    		195621A4000000
    1/2"-28
    		3/4"7/16"Material Certificate
    		191845A34000000
    5/8"-24
    		15/16"35/64"Material Certificate
    		191845A34500000
    11/16"-24
    		1"27/64"Material Certificate
    		195621A70000000
    3/4"-20
    		1 1/8"41/64"Material Certificate
    		191845A35000000
    7/8"-20
    		1 5/16"3/4"Material Certificate
    		191845A35500000
     
    Lightweight Aluminum
    Image of Product. Front orientation. Hex Nuts. Hex Nuts.
    Image of Specification. Front orientation. Hex Nuts. Hex Nuts.
    6061 Aluminum—One-third the weight of steel, these nuts are commonly used in robotics, automation, and other applications that have weight limitations. They're an alternative to stainless steel for rust resistance but are not as strong.
    Thread
    Size
    Wd.
    Ht.
    Specs. Met
    Certificate Type
    Pkg.
    Qty.
    Pkg.
    6061 Aluminum
    1/4"-32
    		7/16"7/32"ASME B18.2.2—590670A240000000
    5/16"-32
    		1/2"17/64"ASME B18.2.2—590670A24300000
    3/8"-32
    		9/16"21/64"ASME B18.2.2—590670A24600000
    7/16"-28
    		11/16"3/8"ASME B18.2.2—190670A2490000
    1/2"-28
    		3/4"7/16"ASME B18.2.2Material Certificate
    		190670A2520000
    5/8"-24
    		15/16"35/64"ASME B18.2.2—190670A2610000
    3/4"-20
    		1 1/8"41/64"ASME B18.2.2—190670A2670000
     
    Plastic
    Image of Product. Front orientation. Hex Nuts. Hex Nuts.
    Image of Specification. Front orientation. Hex Nuts. Hex Nuts.
    Nylon 6/6— The most common plastic nuts, these are good for general purpose fastening. They are slippery and abrasion resistant, so they thread on smoothly and stand up to daily wear and tear. Nylon will swell and weaken when exposed to moisture, so these nuts are best for dry environments.
    Temp.,
    ° F
    Thread
    Size
    Wd.
    Ht.
    Min.
    Max.
    Choose a Color
    Pkg.
    Qty.
    Pkg.
    Nylon 6/6
    3/8"-32
    		9/16"11/32"-40185Black, Off-White5094812A681000000
     

    Stainless Steel Hex Panel Nuts

    Image of Product. Front orientation. Panel Nuts. Stainless Steel Hex Panel Nuts.
    All of these stainless steel panel nuts have some chemical resistance. They can be fastened with a wrench for more torque while tightening than knurled panel nuts. Also known as dress nuts, they are extremely thin for use in tight spaces such as electrical panels.
    UNEF ThreadAbout UNEF Thread
    18-8 Stainless Steel—18-8 stainless steel nuts have good chemical resistance. They may be mildly magnetic.
    Black-Oxide 18-8 Stainless Steel—Black-oxide 18-8 stainless steel nuts have a dark surface color.
    316 Stainless Steel—316 stainless steel nuts have excellent chemical resistance and can be used in saltwater environments.
    Thread
    Size
    Wd.
    Ht.
    Certificate Type
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
    1/4"-32
    		5/16"5/64"Material Certificate
    		1091862A31100000
    1/4"-32
    		3/8"3/32"Material Certificate
    		1091862A3130000
    5/16"-32
    		3/8"3/32"Material Certificate
    		191862A5430000
    5/16"-32
    		7/16"7/64"Material Certificate
    		1091862A31600000
    5/16"-32
    		1/2"17/64"—191862A5440000
    3/8"-32
    		1/2"3/32"Material Certificate
    		191862A5450000
    3/8"-32
    		9/16"21/64"—191862A5460000
    3/8"-32
    		5/8"3/32"—191862A3180000
    7/16"-28
    		5/8"3/32"—191862A3200000
    7/16"-28
    		11/16"3/8"Material Certificate
    		191862A5480000
    15/32"-32
    		9/16"5/64"Material Certificate
    		191862A3250000
    15/32"-32
    		9/16"3/32"—191862A5490000
    15/32"-32
    		5/8"3/32"Material Certificate
    		191862A3290000
    15/32"-32
    		5/8"9/16"—191862A3330000
    1/2"-28
    		5/8"3/32"—191862A33000000
    1/2"-28
    		5/8"1/8"Material Certificate
    		191862A5510000
    11/16"-24
    		1"27/64"—191862A55400000
    3/4"-20
    		1"27/64"Material Certificate
    		191862A55500000
     
    Black-Oxide 18-8 Stainless Steel
    5/16"-32
    		7/16"7/64"Material Certificate
    		591862A57600000
    3/8"-32
    		1/2"3/32"Material Certificate
    		191862A5780000
    7/16"-28
    		5/8"3/32"Material Certificate
    		191862A5840000
    15/32"-32
    		5/8"9/16"—191862A5890000
    1/2"-28
    		5/8"3/32"—191862A59100000
    5/8"-24
    		15/16"3/8"—191862A59400000
    11/16"-24
    		1"27/64"—191862A59500000
    3/4"-20
    		1"27/64"—191862A59600000
     
    316 Stainless Steel
    1/4"-32
    		5/16"5/64"Material Certificate
    		194177A2400000
    5/16"-32
    		3/8"3/32"Material Certificate
    		194177A2700000
    3/8"-32
    		1/2"3/32"—194177A31000000
    7/16"-28
    		5/8"3/32"—194177A3600000
    15/32"-32
    		5/8"9/16"Material Certificate
    		194177A4200000
    1/2"-28
    		5/8"1/8"—194177A44000000
    5/8"-24
    		15/16"3/8"Material Certificate
    		194177A46000000
    11/16"-24
    		1"27/64"Material Certificate
    		194177A47000000
    3/4"-20
    		1"27/64"Material Certificate
    		194177A48000000
    7/8"-20
    		1 5/16"31/64"Material Certificate
    		194177A49000000
     

    Steel Hex Panel Nuts

    Image of Product. Front orientation. Panel Nuts. Steel Hex Panel Nuts.
    Fasten these panel nuts with a wrench for more torque while tightening than knurled panel nuts. Also known as dress nuts, they're extremely thin for use in tight spaces such as electrical panels.
    UNEF ThreadAbout UNEF Thread
    Zinc-Plated Steel—Zinc-plated steel nuts resist corrosion in wet environments.
    Black-Oxide Steel—Black-oxide steel nuts have a dark surface color.
    Thread
    Size
    Wd.
    Ht.
    Certificate Type
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
    1/4"-32
    		5/16"5/64"—1091862A10500000
    1/4"-32
    		3/8"3/32"Material Certificate
    		1091862A1060000
    5/16"-32
    		7/16"7/64"—1091862A1100000
    3/8"-32
    		5/8"3/32"—191862A1120000
    7/16"-28
    		5/8"3/32"Material Certificate
    		191862A1160000
    15/32"-32
    		9/16"5/64"—191862A1190000
    15/32"-32
    		5/8"3/32"Material Certificate
    		191862A1230000
    15/32"-32
    		5/8"9/16"—191862A1260000
    1/2"-28
    		5/8"3/32"—191862A1270000
     
    Black-Oxide Steel
    3/8"-32
    		1/2"3/32"—194162A3100000
    7/16"-28
    		5/8"3/32"—194162A3600000
    1/2"-28
    		5/8"3/32"—194162A4300000
    1/2"-28
    		5/8"1/8"—194162A4400000
    1/2"-28
    		3/4"3/8"—194162A45000000
    5/8"-24
    		15/16"3/8"Material Certificate
    		194162A46000000
    11/16"-24
    		1"27/64"Material Certificate
    		194162A47000000
    3/4"-20
    		1"27/64"Material Certificate
    		194162A48000000
    7/8"-20
    		1 5/16"31/64"Material Certificate
    		194162A49000000
     

    Brass Hex Panel Nuts

    Image of Product. Front orientation. Panel Nuts. Brass Hex Panel Nuts.
    These panel nuts are corrosion resistant in wet environments, electrically conductive, and nonmagnetic. They can be fastened with a wrench for more torque while tightening than knurled panel nuts. Also known as dress nuts, they're extremely thin for use in tight spaces such as electrical panels.
    UNEF ThreadAbout UNEF Thread
    Nickel-Plated Brass—Nickel-plated brass panel nuts have excellent resistance to chemicals and salt water.
    Thread
    Size
    Wd.
    Ht.
    Certificate Type
    Pkg.
    Qty.
    Pkg.
    Brass
    1/4"-32
    		5/16"5/64"—1091862A21600000
    1/4"-32
    		3/8"3/32"Material Certificate
    		1091862A2180000
    5/16"-32
    		7/16"7/64"Material Certificate
    		1091862A2230000
    3/8"-32
    		5/8"3/32"—191862A2250000
    7/16"-28
    		5/8"3/32"—191862A2280000
    15/32"-32
    		5/8"3/32"—191862A2360000
     
    Nickel-Plated Brass
    1/4"-32
    		5/16"5/64"Material Certificate
    		1091862A5160000
    1/4"-32
    		3/8"3/32"—1091862A5150000
    5/16"-32
    		7/16"7/64"Material Certificate
    		1091862A5180000
    3/8"-32
    		1/2"3/32"Material Certificate
    		1091862A5210000
    7/16"-28
    		5/8"3/32"—191862A5230000
    15/32"-32
    		9/16"5/64"Material Certificate
    		1091862A5250000
    15/32"-32
    		9/16"3/32"Material Certificate
    		1091862A5260000
    1/2"-28
    		5/8"1/8"—1091862A5270000
     

    Thin-Profile Hex Nuts

    Image of Product. Front orientation. Hex Nuts. Thin-Profile Hex Nuts.
    About half the height of standard-profile nuts, these fit in spaces with low clearance. You can also use them as jam nuts by threading them against another hex nut to hold it in place.
    Material Certificate Icon
    Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
    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.
    Certificate Type
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
    1/2"-28
    		3/4"5/16"Material Certificate
    		191847A575000000
    5/8"-24
    		15/16"3/8"Material Certificate
    		195621A60000000
    3/4"-20
    		1 1/8"27/64"Material Certificate
    		191847A58000000
    7/8"-20
    		1 5/16"31/64"Material Certificate
    		195621A90000000
     

    Left-Hand-Thread Thin-Profile Hex Nuts

    These nuts tighten when turned to the left. Use them with left-hand rods and screws to prevent counterclockwise-moving parts from loosening. About half the height of standard-profile nuts, these fit in spaces with low clearance. You can also use them as jam nuts by threading them against another hex nut to hold it in place.
    Material Certificate Icon
    Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
    Low-Strength Steel
    Image of Product. Front orientation. Contains Annotated, MultipleImages. Hex Nuts. Left-Hand-Thread Thin-Profile Hex Nuts.
    Rated Grade 2, Class 6, or lower, these nuts are about half as strong as medium-strength nuts. They are suitable for light duty fastening applications, such as securing access panels. Use them with screws that have a similar strength rating to avoid stripping threads during installation.
    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.
    Thread
    Size
    Wd.
    Ht.
    Fastener Strength
    Grade/Class
    Specs.
    Met
    Certificate Type
    Pkg.
    Qty.
    Pkg.
    Black-Oxide Steel
    7/8"-20
    		1 5/16"31/64"SAE Grade 2
    		ASTM A108Material Certificate
    		190519A882000000
     
    Corrosion-Resistant Stainless Steel
    Image of Product. Front orientation. Contains Annotated, MultipleImages. Hex Nuts. Left-Hand-Thread Thin-Profile Hex Nuts.
    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
    Certificate Type
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
    7/8"-20
    		1 5/16"31/64"ASME B18.2.2Material Certificate
    		194450A531000000
     

    DA Collet Nuts

    Image of Product. Front orientation. Collet Nuts. DA Collet Nuts.
    Secure collets inside DA collet chucks, also known as double angle collet chucks. Tightening the nut squeezes the collet around the cutting tool, clamping it firmly in place.
    Nuts
    Open-End
    Wrenches
    Drive
    For Collet
    Type
    Thread
    Size
    Style
    Size
    Max. Rotation
    Speed, rpm
    Dia.
    Ht.
    Recommended Tightening
    Torque, ft·lbf
    Material
    Each
    Each
    DA-10015/16"-20
    		Hex
    		15/16"20,0001.07"1.53"35Steel
    		9508N110000005400A27000000
    DA-1801 1/4"-16
    		Hex
    		1 1/4"20,0001.44"1.6"40Steel
    		9508N1200000———0
    DA-20011/16"-20
    		Hex
    		19 mm20,0000.87"1.41"25Steel
    		9508N13000005488A2500000
    DA-3007/16"-32
    		Hex
    		1/2"20,0000.55"1.08"18Steel
    		9508N1400000———0
     
    back to top