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    56 Products
    About Hex Nuts
    industrial info icon

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

    Hex Nuts

    The most commonly used hex nuts, these are suitable for fastening most machinery and equipment.
    Low-Strength Steel
    Image of Product. Front orientation. Hex Nuts. Hex Nuts.
    Image of Specification. Front orientation. Hex Nuts. 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.
    Hot-Dipped Galvanized Steel—Combines the strength of steel with the rust resistance of stainless steel. These nuts are an economical alternative to 18-8 stainless steel in wet and outdoor environments, but they won't hold up to salt water and chemicals. The galvanized finish is thicker than other types of coatings, so the threads may be more likely to stick during installation. Use with other hot-dipped galvanized fasteners.
    Thread
    Size
    Wd.
    Ht.
    Fastener Strength
    Grade/Class
    Specs. Met
    Certificate Type
    Pkg.
    Qty.
    Pkg.
    Hot-Dipped Galvanized Steel
    1/4"-20
    		7/16"7/32"SAE Grade 2
    		ASME B18.2.2—10090371A02900000
    5/16"-18
    		1/2"17/64"SAE Grade 2
    		ASME B18.2.2Material Certificate
    		10090371A0190000
    3/8"-16
    		9/16"21/64"SAE Grade 2
    		ASME B18.2.2Material Certificate
    		10090371A03100000
    7/16"-14
    		11/16"3/8"SAE Grade 2
    		ASME B18.2.2—5090371A0320000
    1/2"-13
    		3/4"7/16"SAE Grade 2
    		ASME B18.2.2Material Certificate
    		5090371A04500000
    5/8"-11
    		15/16"35/64"SAE Grade 2
    		ASME B18.2.2Material Certificate
    		2590371A05000000
    3/4"-10
    		1 1/8"41/64"SAE Grade 2
    		ASME B18.2.2Material Certificate
    		1090371A0550000
    7/8"-9
    		1 5/16"3/4"SAE Grade 2
    		ASME B18.2.2Material Certificate
    		1090371A06000000
    1"-8
    		1 1/2"55/64"SAE Grade 2
    		ASME B18.2.2Material Certificate
    		590371A06500000
    1 1/8"-7
    		1 11/16"31/32"SAE Grade 2
    		ASME B18.2.2—190371A0670000
    1 1/4"-7
    		1 7/8"1 1/16"SAE Grade 2
    		ASME B18.2.2—190371A0700000
    1 1/2"-6
    		2 1/4"1 9/32"SAE Grade 2
    		ASME B18.2.2—190371A0730000
     

    Jam Nuts for Turnbuckles

    Tighten these nuts against the turnbuckle body to prevent the end fitting from unscrewing.
    For Galvanized Steel Turnbuckles
    Image of Product. Front orientation. Turnbuckles. Jam Nuts for Turnbuckles.
    Left- and Right-Hand
    Thread Direction
    Thread
    Size
    Wd.
    Ht.
    Includes
    Each
    Grade 2 Galvanized Steel
    1/4"-20
    		7/16"5/32"One Left-Hand Threaded Jam Nut, One Right-Hand Threaded Jam Nut3000T75200000
    5/16"-18
    		1/2"3/16"One Left-Hand Threaded Jam Nut, One Right-Hand Threaded Jam Nut3000T7530000
    3/8"-16
    		9/16"7/32"One Left-Hand Threaded Jam Nut, One Right-Hand Threaded Jam Nut3000T7540000
    1/2"-13
    		3/4"5/16"One Left-Hand Threaded Jam Nut, One Right-Hand Threaded Jam Nut3000T7550000
    5/8"-11
    		15/16"25/64"One Left-Hand Threaded Jam Nut, One Right-Hand Threaded Jam Nut3000T7560000
    3/4"-10
    		1 1/8"27/64"One Left-Hand Threaded Jam Nut, One Right-Hand Threaded Jam Nut3000T7570000
    7/8"-9
    		1 19/64"31/64"One Left-Hand Threaded Jam Nut, One Right-Hand Threaded Jam Nut3000T75800000
    1"-8
    		1 15/32"35/64"One Left-Hand Threaded Jam Nut, One Right-Hand Threaded Jam Nut3000T75900000
    1 1/4"-7
    		1 7/8"23/32"One Left-Hand Threaded Jam Nut, One Right-Hand Threaded Jam Nut30045T81100000
    1 1/2"-6
    		2 1/4"27/32"One Left-Hand Threaded Jam Nut, One Right-Hand Threaded Jam Nut30045T81200000
     

    Coupling Nuts

    Image of Product. Front orientation. Coupling Nuts. Coupling Nuts.
    Also known as extension nuts, these are commonly used to connect lengths of threaded rod and join threaded parts.
    Low-Strength Steel
    Rated Grade 2 or lower, these are about half as strong as medium-strength steel coupling nuts. Use them with threaded rods that have a comparable strength rating to avoid stripping threads during installation.
    Hot-Dipped Galvanized Steel—Combines the strength of steel with the rust resistance of stainless steel. These nuts are an economical alternative to 18-8 stainless steel in wet and outdoor environments, but they won't hold up to salt water and chemicals. Use with other hot-dipped galvanized fasteners to ensure the threads mate tightly.
    Each
    Thread
    Size
    Lg.
    Wd.
    Threading
    1-9
    10-49
    50-Up
    Hot-Dipped Galvanized Steel
    3/8"-16
    		1 3/4"5/8"Fully Threaded93350A100000000000000000
    7/16"-14
    		1 3/4"5/8"Fully Threaded93350A105000000000000
    1/2"-13
    		1 3/4"11/16"Fully Threaded93350A110000000000000
    5/8"-11
    		2 1/8"13/16"Fully Threaded93350A115000000000000
    3/4"-10
    		2 1/4"1"Fully Threaded93350A120000000000000
    3/4"-10
    		3"1"Fully Threaded93350A125000000000000
    7/8"-9
    		2 1/2"1 1/4"Fully Threaded93350A03700000000000000
    1"-8
    		2 3/4"1 3/8"Fully Threaded93350A038000000000000000
    1"-8
    		3"1 3/8"Fully Threaded93350A136000000000000000
    1 1/8"-7
    		3"1 1/2"Fully Threaded93350A147000000000000000
    1 1/4"-7
    		3"1 5/8"Fully Threaded93350A040000000000000000
     
    Medium-Strength Steel
    These Grade 5 or Class 8 nuts are about twice as strong as low-strength steel coupling nuts. Use them with threaded rods that have a comparable strength rating to avoid stripping threads during installation.
    Hot-Dipped Galvanized Steel—Combines the strength of steel with the rust resistance of stainless steel. These nuts are an economical alternative to 18-8 stainless steel in wet and outdoor environments, but they won't hold up to salt water and chemicals. Use with other hot-dipped galvanized fasteners to ensure the threads mate tightly.
    Each
    Thread
    Size
    Lg.
    Wd.
    Fastener Strength
    Grade/Class
    Threading
    1-9
    10-49
    50-Up
    Hot-Dipped Galvanized Steel
    3/4"-10
    		2 1/4"1"SAE Grade 5
    		Fully Threaded90977A261000000000000000000
    1"-8
    		2 3/4"1 3/8"SAE Grade 5
    		Fully Threaded90977A262000000000000000
    1 1/4"-7
    		3"1 5/8"SAE Grade 5
    		Fully Threaded90977A263000000000000000
     

    Steel Hex Head Screw Kits for Metal Pipe Flanges

    Image of ProductInUse. Shown Installed. Front orientation. Hex Head Screws. Steel Hex Head Screw Kits for Metal Pipe Flanges.
    Image of Product. Front orientation. Hex Head Screws. Steel Hex Head Screw Kits for Metal Pipe Flanges.

    Shown Installed

    Join steel or cast iron pipe flanges. These kits come with screws and nuts in the right size and number to match your flange's bolt holes. The screws have a head with six flat sides to keep wrenches and sockets from slipping and rounding off the drive.
    Screw length is measured from under the head. For a tight seal, you’ll also need a gasket between the flanges.
    Hot-Dipped Galvanized Steel—The strength of steel with the rust resistance of stainless steel. These screws are an economical alternative to 18-8 stainless steel in wet and outdoor environments, but they won't hold up to salt water and chemicals. The galvanized finish is thicker than other types of coatings, so the threads may be more likely to stick during installation. You can only mate these screws with hot-dipped galvanized nuts.
    Screw
    Nut
    Hot-Dipped Galvanized
    Steel Screws and Nuts
    For Pipe
    Size
    Thread
    Size
    Lg.
    Head
    Wd.
    Head
    Ht.
    Threading
    Thread
    Spacing
    Tensile Strength,
    psi
    Wd.
    Ht.
    Includes
    Each
    For Class 125/150 Flanges
    1/2, 3/4
    		1/2"-13
    		2"3/4"11/32"Partially ThreadedCoarse
    		60,0003/4"7/16"4 Hex Head Screws
    4 Hex Nuts    		97788A12500000
    1, 1 1/4
    		1/2"-13
    		2 1/4"3/4"11/32"Partially ThreadedCoarse
    		60,0003/4"7/16"4 Hex Head Screws
    4 Hex Nuts    		97788A1270000
    1 1/2
    		1/2"-13
    		2 1/2"3/4"11/32"Partially ThreadedCoarse
    		60,0003/4"7/16"4 Hex Head Screws
    4 Hex Nuts    		97788A1280000
    2
    		5/8"-11
    		2 3/4"15/16"27/64"Partially ThreadedCoarse
    		60,00015/16"35/64"4 Hex Head Screws
    4 Hex Nuts    		97788A1340000
    2 1/2, 3
    		5/8"-11
    		3"15/16"27/64"Partially ThreadedCoarse
    		60,00015/16"35/64"4 Hex Head Screws
    4 Hex Nuts    		97788A1350000
    3 1/2, 4
    		5/8"-11
    		3"15/16"27/64"Partially ThreadedCoarse
    		60,00015/16"35/64"8 Hex Head Screws
    8 Hex Nuts    		97788A14400000
    5, 6
    		3/4"-10
    		3 1/4"1 1/8"1/2"Partially ThreadedCoarse
    		60,0001 1/8"41/64"8 Hex Head Screws
    8 Hex Nuts    		97788A15100000
    10, 12
    		7/8"-9
    		4"1 5/16"37/64"Partially ThreadedCoarse
    		60,0001 5/16"3/4"12 Hex Head Screws
    12 Hex Nuts    		97788A15400000
     
    For Class 250/300 Flanges
    1/2
    		1/2"-13
    		2 1/4"3/4"11/32"Partially ThreadedCoarse
    		60,0003/4"7/16"4 Hex Head Screws
    4 Hex Nuts    		97788A1230000
    3/4, 1
    		5/8"-11
    		2 1/2"15/16"27/64"Partially ThreadedCoarse
    		60,00015/16"35/64"4 Hex Head Screws
    4 Hex Nuts    		97788A1290000
    1 1/4
    		5/8"-11
    		2 3/4"15/16"27/64"Partially ThreadedCoarse
    		60,00015/16"35/64"4 Hex Head Screws
    4 Hex Nuts    		97788A1310000
    1 1/2
    		3/4"-10
    		3"1 1/8"1/2"Partially ThreadedCoarse
    		60,0001 1/8"41/64"4 Hex Head Screws
    4 Hex Nuts    		97788A1390000
    2
    		5/8"-11
    		3"15/16"27/64"Partially ThreadedCoarse
    		60,00015/16"35/64"8 Hex Head Screws
    8 Hex Nuts    		97788A14200000
    2 1/2
    		3/4"-10
    		3 1/4"1 1/8"1/2"Partially ThreadedCoarse
    		60,0001 1/8"41/64"8 Hex Head Screws
    8 Hex Nuts    		97788A14800000
    3
    		3/4"-10
    		3 1/2"1 1/8"1/2"Partially ThreadedCoarse
    		60,0001 1/8"41/64"8 Hex Head Screws
    8 Hex Nuts    		97788A14600000
    3 1/2, 4
    		3/4"-10
    		3 3/4"1 1/8"1/2"Partially ThreadedCoarse
    		60,0001 1/8"41/64"8 Hex Head Screws
    8 Hex Nuts    		97788A14900000
    6
    		3/4"-10
    		4 1/4"1 1/8"1/2"Partially ThreadedCoarse
    		60,0001 1/8"41/64"12 Hex Head Screws
    12 Hex Nuts    		97788A15300000
    8
    		7/8"-9
    		4 3/4"1 5/16"37/64"Partially ThreadedCoarse
    		60,0001 5/16"3/4"12 Hex Head Screws
    12 Hex Nuts    		97788A157000000
     
    For PN10/PN16 Flanges
    2
    		M16 × 2 mm55 mm24 mm10 mmPartially ThreadedCoarse
    		110,00024 mm13 mm4 Hex Head Screws
    4 Hex Nuts    		97788A11400000
    3, 4
    		M16 × 2 mm60 mm24 mm10 mmPartially ThreadedCoarse
    		110,00024 mm13 mm8 Hex Head Screws
    8 Hex Nuts    		97788A11500000
     
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