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    84 Products
    About Hex Head Screws and Bolts
    industrial info icon

    Choose a hex head fastener with the right threading, thread size, material, and strength for your equipment.

    Steel Hex Head Screws with External-Tooth Lock Washer

    Image of Product. Fully Threaded. Front orientation. Hex Head Screws. Steel Hex Head Screws with External-Tooth Lock Washer.

    Fully Threaded

    A washer with sharp external teeth grips your material to resist frequent vibration better than internal-tooth lock washers. However, the teeth can mar surfaces and snag nearby objects. Also known as Sems screws, the washer on these rotates freely but is permanently attached. The head gives you six, flat contact points, so wrenches and sockets won't slip and round off the drive.
    Length is measured from under the head.
    Medium-Strength Fastener—Your go-to screws for fastening most machinery and equipment. They have tensile strengths from 90,000 to 120,000 psi.
    Low-Strength Fastener—Suitable for light duty applications, such as securing access panels. These screws have a tensile strength of 60,000 psi and lower.
    Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.
    Head
    Washer
    Lg.
    Wd.
    Ht.
    OD
    Thk.
    Threading
    Thread
    Spacing
    Fastener Strength
    Grade/Class
    Tensile Strength,
    psi
    Pkg.
    Qty.
    Pkg.
    Medium-Strength Zinc-Plated Steel
     
    1/4"-20
    1/2"7/16"3/16"0.475"0.025"Fully ThreadedCoarse
    SAE Grade 5.1120,0002594881A110000000
    3/4"7/16"3/16"0.475"0.025"Fully ThreadedCoarse
    SAE Grade 5.1120,0002594881A12000000
    1"7/16"3/16"0.475"0.025"Fully ThreadedCoarse
    SAE Grade 5.1120,0002594881A13000000
     
    3/8"-16
    1"9/16"9/32"0.660"0.035"Fully ThreadedCoarse
    SAE Grade 5.1120,0001094881A14000000
    1 1/4"9/16"9/32"0.660"0.035"Fully ThreadedCoarse
    SAE Grade 5.1120,0001094881A15000000
    1 1/2"9/16"9/32"0.660"0.035"Fully ThreadedCoarse
    SAE Grade 5.1120,0001094881A16000000
     
    Low-Strength Zinc-Plated Steel
     
    6-32
    1/4"1/4"3/32"0.285"0.022"Fully ThreadedCoarse
    60,0002590401A1440000
    3/8"1/4"3/32"0.285"0.022"Fully ThreadedCoarse
    60,00010090401A14600000
    1/2"1/4"3/32"0.285"0.022"Fully ThreadedCoarse
    60,0002590401A1480000
     
    8-32
    1/4"5/16"7/64"0.317"0.023"Fully ThreadedCoarse
    60,0005090401A1900000
    3/8"5/16"7/64"0.317"0.023"Fully ThreadedCoarse
    60,0005090401A1920000
    1/2"5/16"7/64"0.317"0.023"Fully ThreadedCoarse
    60,0001090401A1940000
     
    10-24
    3/8"5/16"1/8"0.381"0.024"Fully ThreadedCoarse
    60,0002590401A2400000
    1/2"5/16"1/8"0.381"0.024"Fully ThreadedCoarse
    60,0002590401A2420000
     
    10-32
    3/8"5/16"1/8"0.381"0.024"Fully ThreadedFine
    60,0002590401A8270000
    1/2"5/16"1/8"0.381"0.024"Fully ThreadedFine
    60,00010090401A82900000
     
    1/4"-20
    3/8"7/16"3/16"0.475"0.028"Fully ThreadedCoarse
    60,0002590401A5350000
    1/2"7/16"3/16"0.475"0.028"Fully ThreadedCoarse
    60,0005090401A53700000
    3/4"7/16"3/16"0.475"0.028"Fully ThreadedCoarse
    60,0005090401A54000000
    1"7/16"3/16"0.475"0.028"Fully ThreadedCoarse
    60,0002590401A54200000
     

    Stainless Steel Socket Head Screws with Split Lock Washer

    Image of Product. Front orientation. Socket Head Screws. Stainless Steel Socket Head Screws with Split Lock Washer.
    Light vibration won't loosen these corrosion-resistant screws. As you twist, the uneven ends of the washer bite into the screw and mating surface for a tight hold. Also known as Sems screws, the washer rotates freely but is permanently attached. Their deep, six-point socket keeps hex keys from slipping out and damaging the drive.
    Length is measured from under the head.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these screws won't rust. However, they don't hold up to the harsh chemicals that 316 stainless steel screws can.
    Head
    Washer
    Lg.
    Dia.
    Ht.
    OD
    Thk.
    Threading
    Thread
    Spacing
    Tensile Strength,
    psi
    Each
    18-8 Stainless Steel
     
    6-32
    1/4"0.226"0.138"0.204"0.04"Fully ThreadedCoarse
    70,00094912A10000000
    3/8"0.226"0.138"0.204"0.04"Fully ThreadedCoarse
    70,00094912A1050000
    1/2"0.226"0.138"0.204"0.04"Fully ThreadedCoarse
    70,00094912A1100000
    3/4"0.226"0.138"0.204"0.04"Fully ThreadedCoarse
    70,00094912A1150000
     
    8-32
    3/8"0.27"0.164"0.243"3/64"Fully ThreadedCoarse
    70,00094912A2200000
    1/2"0.27"0.164"0.243"3/64"Fully ThreadedCoarse
    70,00094912A2250000
    5/8"0.27"0.164"0.243"3/64"Fully ThreadedCoarse
    70,00094912A2300000
    3/4"0.27"0.164"0.243"3/64"Fully ThreadedCoarse
    70,00094912A2350000
    1"0.27"0.164"0.243"3/64"Fully ThreadedCoarse
    70,00094912A2400000
     
    10-32
    1/2"5/16"0.19"19/64"3/64"Fully ThreadedFine
    70,00094912A3300000
    5/8"5/16"0.19"19/64"3/64"Fully ThreadedFine
    70,00094912A3350000
    3/4"5/16"0.19"19/64"3/64"Fully ThreadedFine
    70,00094912A3400000
    1"5/16"0.19"19/64"3/64"Fully ThreadedFine
    70,00094912A3450000
     
    1/4"-20
    1/2"3/8"1/4"0.354"1/16"Fully ThreadedCoarse
    70,00094912A4500000
    5/8"3/8"1/4"0.354"1/16"Fully ThreadedCoarse
    70,00094912A4550000
    3/4"3/8"1/4"0.354"1/16"Fully ThreadedCoarse
    70,00094912A4600000
    1"3/8"1/4"0.354"1/16"Fully ThreadedCoarse
    70,00094912A4650000
    1 1/4"3/8"1/4"0.354"1/16"Fully ThreadedCoarse
    70,00094912A4700000
     

    Steel Slotted Hex Head Screws with External-Tooth Lock Washer

    Image of Product. Front orientation. Hex Head Screws. Steel Slotted Hex Head Screws with External-Tooth Lock Washer.
    Slip a screwdriver into the slotted drive to turn these screws when there isn't room to use a wrench. The washer on these screws has sharp external teeth to grasp material and resist frequent vibration better than internal-tooth lock washers. However, the teeth can mar surfaces and snag nearby objects. Also known as Sems screws, the washer rotates freely but is permanently attached. The head's six flat sides keep wrenches and sockets from slipping and rounding off the drive.
    Length is measured from under the head.
    Low-Strength Fastener—Suitable for light duty applications, such as securing access panels. These screws have a tensile strength of 60,000 psi and lower.
    Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.
    Material Certificate Icon
    Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
    Head
    Washer
    Lg.
    Wd.
    Ht.
    OD
    Thk.
    Threading
    Thread
    Spacing
    Tensile Strength,
    psi
    Pkg.
    Qty.
    Pkg.
    Low-Strength Zinc-Plated Steel
     
    10-24
    3/8"5/16"1/8"0.381"0.024"Fully ThreadedCoarse
    60,0005094461A110000000
    1/2"5/16"1/8"0.381"0.024"Fully ThreadedCoarse
    60,0005094461A12000000
     
    10-32
    3/8"5/16"1/8"0.381"0.024"Fully ThreadedFine
    60,00010094461A13000000
    1/2"5/16"1/8"0.381"0.024"Fully ThreadedFine
    60,0002594461A14000000
     
    1/4"-20
    1/2"3/8"3/16"0.510"0.028"Fully ThreadedCoarse
    60,0005094461A15000000
    3/4"3/8"3/16"0.510"0.028"Fully ThreadedCoarse
    60,0002594461A16000000
     

    Stainless Steel Hex Head Screws with External-Tooth Lock Washer

    Image of Product. Front orientation. Hex Head Screws. Stainless Steel Hex Head Screws with External-Tooth Lock Washer.
    The sharp external teeth on these corrosion-resistant screws hold during frequent vibration. However, the teeth can mar surfaces and snag nearby objects. Also known as Sems screws, the washer rotates freely but is permanently attached. The head's six flat sides keep wrenches and sockets from slipping and rounding off the drive.
    Length is measured from under the head.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these screws won't rust. However, they don't hold up to the harsh chemicals that 316 stainless steel screws can.
    Head
    Washer
    Lg.
    Wd.
    Ht.
    OD
    Thk.
    Threading
    Thread
    Spacing
    Tensile Strength,
    psi
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
     
    6-32
    1/4"1/4"3/32"0.285"0.022"Fully ThreadedCoarse
    80,0002590401A314000000
    3/8"1/4"3/32"0.285"0.022"Fully ThreadedCoarse
    80,0002590401A31500000
    1/2"1/4"3/32"0.285"0.022"Fully ThreadedCoarse
    80,0002590401A31600000
     
    8-32
    1/4"1/4"7/64"0.320"0.023"Fully ThreadedCoarse
    80,0002590401A31700000
    3/8"1/4"7/64"0.320"0.023"Fully ThreadedCoarse
    80,0002590401A31800000
    1/2"1/4"7/64"0.320"0.023"Fully ThreadedCoarse
    80,0002590401A31900000
     
    10-24
    3/8"5/16"1/8"0.381"0.024"Fully ThreadedCoarse
    80,0002590401A32100000
    1/2"5/16"1/8"0.381"0.024"Fully ThreadedCoarse
    80,0002590401A32200000
     
    10-32
    3/8"5/16"1/8"0.381"0.024"Fully ThreadedFine
    80,0002590401A32300000
    1/2"5/16"1/8"0.381"0.024"Fully ThreadedFine
    80,0002590401A32400000
    3/4"5/16"1/8"0.381"0.024"Fully ThreadedFine
    80,0002590401A32500000
    1"5/16"1/8"0.381"0.024"Fully ThreadedFine
    80,0002590401A32600000
     
    1/4"-20
    1/2"7/16"3/16"0.475"0.025"Fully ThreadedCoarse
    80,0002590401A31100000
    3/4"7/16"3/16"0.475"0.025"Fully ThreadedCoarse
    80,0002590401A31200000
    1"7/16"3/16"0.475"0.025"Fully ThreadedCoarse
    80,0002590401A31300000
     

    Steel Flanged Slotted Hex Head Screws with Internal-Tooth Lock Washer

    Image of Product. Front orientation. Hex Head Screws. Steel Flanged Slotted Hex Head Screws with Internal-Tooth Lock Washer.
    A washer with sharp internal teeth keeps these screws in place during vibration. Unlike external-tooth lock washers, their smooth outside edge is less likely to mar and won't snag on nearby objects. However, they don't hold as well, so opt for external-tooth washers for higher vibration resistance. Also known as Sems screws, the washer rotates freely but is permanently attached. If there isn't enough room to turn them with a wrench, slip a screwdriver into the slotted drive. When using a wrench or socket, the head's six flat sides prevent slipping and rounding off the drive.
    Head height includes the flange. Length is measured from under the flange.
    Low-Strength Fastener—Suitable for light duty applications, such as securing access panels. These screws have a tensile strength of 60,000 psi and lower.
    Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.
    Material Certificate Icon
    Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
    Head
    Washer
    Lg.
    Wd.
    Ht.
    OD
    Thk.
    Threading
    Thread
    Spacing
    Tensile Strength,
    psi
    Pkg.
    Qty.
    Pkg.
    Low-Strength Zinc-Plated Steel
     
    8-32
    3/8"1/4"9/64"0.338"0.023"Fully ThreadedCoarse
    60,0005094461A170000000
     
    10-32
    3/8"5/16"5/32"0.383"0.024"Fully ThreadedFine
    60,0005094461A18000000
    1/2"5/16"5/32"0.383"0.024"Fully ThreadedFine
    60,0005094461A19000000
    3/4"5/16"5/32"0.383"0.024"Fully ThreadedFine
    60,0005094461A21000000
     

    Steel Socket Head Screws with Split Lock Washer

    Image of Product. Front orientation. Socket Head Screws. Steel Socket Head Screws with Split Lock Washer.
    Light vibration won't loosen these screws. As you twist, the uneven ends of the washer bite into the screw and mating surface for a tight hold. Also known as Sems screws, the washer rotates freely but is permanently attached. These are our strongest alloy steel screws. Their deep, six-point socket keeps hex keys from slipping out and damaging the drive.
    Length is measured from under the head.
    Black-Oxide Alloy Steel—Best for dry environments since moisture will cause these screws to rust. They have a dark, matte appearance.
    Head
    Washer
    Lg.
    Dia.
    Ht.
    OD
    Thk.
    Threading
    Thread
    Spacing
    Tensile Strength,
    psi
    Each
    Black-Oxide Alloy Steel
     
    4-40
    1/4"0.183"0.112"11/64"0.03"Fully ThreadedCoarse
    180,00090342A11100000
    3/8"0.183"0.112"11/64"0.03"Fully ThreadedCoarse
    180,00090342A1120000
    1/2"0.183"0.112"11/64"0.03"Fully ThreadedCoarse
    180,00090342A1130000
     
    6-32
    1/4"0.226"0.138"0.204"0.04"Fully ThreadedCoarse
    180,00090342A1140000
    3/8"0.226"0.138"0.204"0.04"Fully ThreadedCoarse
    180,00090342A1150000
    1/2"0.226"0.138"0.204"0.04"Fully ThreadedCoarse
    180,00090342A1160000
     
    8-32
    3/8"0.27"0.164"0.243"3/64"Fully ThreadedCoarse
    180,00090342A1170000
    1/2"0.27"0.164"0.243"3/64"Fully ThreadedCoarse
    180,00090342A1180000
    5/8"0.27"0.164"0.243"3/64"Fully ThreadedCoarse
    180,00090342A1190000
    3/4"0.27"0.164"0.243"3/64"Fully ThreadedCoarse
    180,00090342A1200000
    1"0.27"0.164"0.243"3/64"Fully ThreadedCoarse
    180,00090342A1210000
     
    10-32
    3/8"5/16"0.19"19/64"3/64"Fully ThreadedFine
    180,00090342A1220000
    1/2"5/16"0.19"19/64"3/64"Fully ThreadedFine
    180,00090342A1230000
    3/4"5/16"0.19"19/64"3/64"Fully ThreadedFine
    180,00090342A1240000
    1"5/16"0.19"19/64"3/64"Fully ThreadedFine
    180,00090342A1250000
     
    1/4"-20
    3/8"3/8"1/4"0.354"1/16"Fully ThreadedCoarse
    180,00090342A1260000
    1/2"3/8"1/4"0.354"1/16"Fully ThreadedCoarse
    180,00090342A1270000
    3/4"3/8"1/4"0.354"1/16"Fully ThreadedCoarse
    180,00090342A1280000
    1"3/8"1/4"0.354"1/16"Fully ThreadedCoarse
    180,00090342A1290000
    1 1/4"3/8"1/4"0.354"1/16"Fully ThreadedCoarse
    180,00090342A1300000
    1 1/2"3/8"1/4"0.354"1/16"Fully ThreadedCoarse
    180,00090342A1310000
     
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