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)
    52 Products
    About Hex Nuts
    industrial info icon

    Choose a hex nut with the right profile, material, and strength for your application.

    Hex Nuts

    Image of Product. Front orientation. Hex Nuts. Hex Nuts.
    The most commonly used hex nuts, these are suitable for fastening most machinery and equipment.
    High-Temperature Ceramic
    Ceramic—Secure components in industrial furnaces, kilns, and other extreme-heat applications. These nuts won't melt, seize, or become brittle—even at temperatures up to 3000° F. Ceramic nuts may crack or dent if subjected to hard bumps and vibrations.
    Thread
    Size
    Wd.
    Ht.
    Max. Temp.,
    ° F
    Color
    Pkg.
    Qty.
    Pkg.
    Ceramic
    2-56
    		3/16"1/16"3,000Off-White1000000000000000
    4-40
    		1/4"3/32"3,000Off-White100000000000000
    6-32
    		5/16"7/64"3,000Off-White100000000000000
    8-32
    		11/32"1/8"3,000Off-White100000000000000
    10-24
    		3/8"1/8"3,000Off-White100000000000000
    10-32
    		3/8"1/8"3,000Off-White100000000000000
    1/4"-20
    		7/16"7/32"3,000Off-White100000000000000
    1/4"-28
    		7/16"7/32"3,000Off-White100000000000000
    5/16"-18
    		1/2"17/64"3,000Off-White100000000000000
    3/8"-16
    		9/16"21/64"3,000Off-White100000000000000
     

    Electrical-Insulating Female Threaded Standoffs

    Our best electrically insulating standoffs. They prevent electrical currents from passing through enclosures and conductive surfaces. These standoffs are often installed in circuit-breaker housings and semiconductors.
    Round
    Image of Product. Front orientation. Standoffs. Electrical-Insulating Female Threaded Standoffs, Round.
    Image of Attribute. Fully Threaded. Front orientation. Contains Annotated. Fully Threaded. Electrical-Insulating Female Threaded Standoffs, Round.
    Image of Attribute. Threaded on Both Ends. Front orientation. Threaded on Both Ends. Electrical-Insulating Female Threaded Standoffs, Round.

    Fully

    Threaded

    Threaded on

    Both Ends

    High-Temperature Grade L5 Ceramic—Our most heat-resistant standoffs, even at blistering temperatures up to 1700° F. However, ceramic is brittle and can crack under mechanical stress.
    Lg.
    OD
    Threading
    Thread
    Lg.
    Min. Thread
    Lg.
    Dielectric Strength,
    V/mil
    Voltage
    Rating
    Temp. Range,
    ° F
    Each
    High-Temperature Grade L5 Ceramic
     
    6-32
    1/4"1/4"Fully Threaded1/4"—275Not Rated50 to 1,70000000000000000
    3/8"3/8"Threaded on Both Ends—1/8"275Not Rated50 to 1,7000000000000000
    1/2"1/4"Threaded on Both Ends—3/16"275Not Rated50 to 1,7000000000000000
    1/2"3/8"Threaded on Both Ends—1/8"275Not Rated50 to 1,7000000000000000
    1/2"1/2"Threaded on Both Ends—5/32"275Not Rated50 to 1,7000000000000000
    3/4"1/4"Threaded on Both Ends—1/4"275Not Rated50 to 1,7000000000000000
    3/4"3/8"Threaded on Both Ends—1/4"275Not Rated50 to 1,7000000000000000
    3/4"1/2"Threaded on Both Ends—1/4"275Not Rated50 to 1,7000000000000000
    1"1/4"Threaded on Both Ends—3/8"275Not Rated50 to 1,7000000000000000
    1"3/8"Threaded on Both Ends—3/8"275Not Rated50 to 1,7000000000000000
    1"1/2"Threaded on Both Ends—3/8"275Not Rated50 to 1,7000000000000000
    1 1/4"1/4"Threaded on Both Ends—3/8"275Not Rated50 to 1,7000000000000000
    1 1/2"1/4"Threaded on Both Ends—3/8"275Not Rated50 to 1,7000000000000000
    1 1/2"3/8"Threaded on Both Ends—3/8"275Not Rated50 to 1,7000000000000000
    1 1/2"1/2"Threaded on Both Ends—9/16"275Not Rated50 to 1,7000000000000000
    2"1/2"Threaded on Both Ends—1/2"275Not Rated50 to 1,7000000000000000
    2 1/2"1/2"Threaded on Both Ends—1/2"275Not Rated50 to 1,7000000000000000
    3"1/2"Threaded on Both Ends—3/8"275Not Rated50 to 1,70000000000000000
     
    8-32
    1/2"3/8"Threaded on Both Ends—5/32"275Not Rated50 to 1,7000000000000000
    3/4"3/8"Threaded on Both Ends—3/16"275Not Rated50 to 1,7000000000000000
    1"3/8"Threaded on Both Ends—3/8"275Not Rated50 to 1,7000000000000000
    1 1/2"3/8"Threaded on Both Ends—3/8"275Not Rated50 to 1,7000000000000000
     
    1/4"-20
    1"3/4"Threaded on Both Ends—3/8"275Not Rated50 to 1,7000000000000000
    1"1"Threaded on Both Ends—3/8"275Not Rated50 to 1,70000000000000000
    1 1/2"3/4"Threaded on Both Ends—3/8"275Not Rated50 to 1,7000000000000000
    1 1/2"1"Threaded on Both Ends—1/2"275Not Rated50 to 1,70000000000000000
    1 1/2"1 1/4"Threaded on Both Ends—5/8"275Not Rated50 to 1,70000000000000000
    2"3/4"Threaded on Both Ends—3/4"275Not Rated50 to 1,7000000000000000
    2"1"Threaded on Both Ends—5/8"275Not Rated50 to 1,70000000000000000
    2"1 1/4"Threaded on Both Ends—5/8"275Not Rated50 to 1,70000000000000000
    2 1/2"3/4"Threaded on Both Ends—3/4"275Not Rated50 to 1,70000000000000000
    3"3/4"Threaded on Both Ends—3/4"275Not Rated50 to 1,70000000000000000
    3"1"Threaded on Both Ends—5/8"275Not Rated50 to 1,70000000000000000
    3"1 1/4"Threaded on Both Ends—5/8"275Not Rated50 to 1,70000000000000000
    3 1/2"3/4"Threaded on Both Ends—3/4"275Not Rated50 to 1,70000000000000000
    4"3/4"Threaded on Both Ends—3/4"275Not Rated50 to 1,70000000000000000
    4"1"Threaded on Both Ends—5/8"275Not Rated50 to 1,70000000000000000
    4"1 1/4"Threaded on Both Ends—5/8"275Not Rated50 to 1,70000000000000000
    5"1 1/4"Threaded on Both Ends—5/8"275Not Rated50 to 1,70000000000000000
     

    Twist-On Wire Connectors

    Image of Product. Front orientation. Wire Splices, Connectors, and Taps. Twist-On Wire Connectors, Straight Grip.

    Straight Grip

    Twist onto the wire instead of crimping for fast and easy installation.
    For Wire
    Wire
    Combination
    Insulation
    Ga.
    Construction
    Material
    Min.
    Max.
    Color
    Material
    Terminal
    Material
    Max. Temp.,
    ° F
    Max. Voltage
    Certification
    Reusable
    Pkg.
    Qty.
    Pkg.
    Straight Grip
    18 to 14Stranded
    		CopperTwo 18-Ga. WiresFour 16-Ga. WiresWhitePorcelainPorcelain1,200300V AC
    300V DC    		CSA Certified, UL Listed
    		Yes10000000000000
    18 to 14Stranded
    		CopperTwo 18-Ga. WiresTwo 16-Ga. Wires with One 18-Ga. WireWhitePorcelainPorcelain1,200300V AC
    300V DC    		CSA Certified, UL Listed
    		Yes1000000000000
    18 to 14Stranded
    		CopperTwo 18-Ga. WiresTwo 16-Ga. Wires with Two 18-Ga. WiresWhitePorcelainPorcelain1,200300V AC
    300V DC    		CSA Certified, UL Listed
    		Yes1000000000000
     
    back to top