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    169 Products

    Stainless Steel Hex-Drive Flat Head Screws

    Image of Product. Front orientation. Flat Head Screws. Stainless Steel Hex-Drive Flat Head Screws.
    The most corrosion-resistant hex-drive flat head screws we offer. Made of stainless steel, they won't rust or corrode when exposed to moisture and chemicals, but they're not as strong as alloy steel. With six contact points, the hex drive withstands more torque than slotted and Phillips to securely grip your driver without slipping and stripping the drive.
    Length is measured from the top of 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 can.
    Highly Corrosion-Resistant 316 Stainless Steel—Superior to 18-8 stainless steel, these screws won't degrade when exposed to harsh weather, salt water, and most chemicals.
    Highly 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 screws will hold up in just about any environment, including salt water and most chemicals.
    Standard Profile—Standard-profile heads are the most common choice for flat head screws.
    Undercut Profile—About a third thinner than standard heads, the undercut profile fits into shallow holes in thin material. The thin head also has more threading on the shaft, so they're often used to keep short screws from coming loose.
    Head
    Lg.
    Countersink
    Angle
    Flat Head
    Profile
    Dia.
    Ht.
    Threading
    Tensile Strength,
    psi
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
     
    4-40
    1/8"82°
    Undercut
    0.212"0.047"Fully Threaded70,0001092210A355000000
    3/16"82°
    Undercut
    0.255"0.047"Fully Threaded70,000ASME B18.3, ASTM F87910092210A1030000
    3/16"100°
    Standard
    0.255"0.059"Partially Threaded70,000199926A1010000
    1/4"100°
    Standard
    0.255"0.059"Partially Threaded70,000199926A1020000
    5/16"100°
    Standard
    0.255"0.059"Partially Threaded70,000199926A1030000
    3/8"100°
    Standard
    0.255"0.059"Partially Threaded70,000199926A1040000
    1/2"100°
    Standard
    0.255"0.059"Partially Threaded70,000199926A1050000
     
    6-32
    3/16"82°
    Undercut
    0.307"0.059"Fully Threaded70,000ASME B18.32592210A1420000
    1/4"100°
    Undercut
    0.307"0.066"Partially Threaded70,000199926A1060000
    5/16"100°
    Undercut
    0.307"0.066"Partially Threaded70,000199926A1070000
    3/8"100°
    Undercut
    0.307"0.066"Partially Threaded70,000199926A1080000
    1/2"100°
    Undercut
    0.307"0.066"Partially Threaded70,000199926A1090000
    5/8"100°
    Undercut
    0.307"0.066"Partially Threaded70,000199926A1110000
    3/4"100°
    Undercut
    0.307"0.066"Partially Threaded70,000199926A1120000
    1"100°
    Undercut
    0.307"0.066"Partially Threaded70,000199926A1130000
     
    8-32
    1/4"100°
    Undercut
    0.359"0.076"Partially Threaded70,000199926A1140000
    5/16"100°
    Undercut
    0.359"0.076"Partially Threaded70,000199926A1150000
    3/8"100°
    Undercut
    0.359"0.076"Partially Threaded70,000199926A1160000
    1/2"100°
    Undercut
    0.359"0.076"Partially Threaded70,000199926A1170000
    5/8"100°
    Undercut
    0.359"0.076"Partially Threaded70,000199926A1180000
    3/4"100°
    Undercut
    0.359"0.076"Partially Threaded70,000199926A1190000
    1"100°
    Undercut
    0.359"0.076"Partially Threaded70,000199926A1210000
     
    10-24
    1/4"82°
    Undercut
    0.411"0.081"Fully Threaded70,000ASME B18.32592210A2360000
    3/8"100°
    Undercut
    0.411"0.084"Partially Threaded70,000199926A1220000
    1/2"100°
    Undercut
    0.411"0.084"Partially Threaded70,000199926A1230000
    5/8"100°
    Undercut
    0.411"0.084"Partially Threaded70,000199926A1240000
    3/4"100°
    Undercut
    0.411"0.084"Partially Threaded70,000199926A1250000
    1"100°
    Undercut
    0.411"0.084"Partially Threaded70,000199926A1260000
     
    10-32
    1/4"82°
    Undercut
    0.411"0.081"Fully Threaded70,000ASME B18.35092210A2970000
    3/8"100°
    Undercut
    0.411"0.084"Partially Threaded70,000199926A1280000
    1/2"100°
    Undercut
    0.411"0.084"Partially Threaded70,000199926A1290000
    5/8"100°
    Undercut
    0.411"0.084"Partially Threaded70,000199926A1310000
    3/4"100°
    Undercut
    0.411"0.084"Partially Threaded70,000199926A1320000
    1"100°
    Undercut
    0.411"0.084"Partially Threaded70,000199926A1330000
    1 1/2"100°
    Undercut
    0.411"0.084"Partially Threaded70,000199926A1340000
     
    1/4"-20
    1/4"82°
    Undercut
    0.531"0.161"Partially Threaded70,000192210A3460000
    3/8"100°
    Undercut
    0.531"0.105"Partially Threaded70,000199926A1350000
    1/2"100°
    Undercut
    0.531"0.105"Partially Threaded70,000199926A1360000
    5/8"100°
    Undercut
    0.531"0.105"Partially Threaded70,000199926A1370000
    3/4"100°
    Undercut
    0.531"0.105"Partially Threaded70,000199926A1380000
    7/8"100°
    Undercut
    0.531"0.105"Partially Threaded70,000199926A1390000
    1"100°
    Undercut
    0.531"0.105"Partially Threaded70,000199926A1410000
    1 1/4"100°
    Undercut
    0.531"0.105"Partially Threaded70,000199926A1420000
    1 1/2"100°
    Undercut
    0.531"0.105"Partially Threaded70,000199926A14300000
    1 3/4"100°
    Undercut
    0.531"0.105"Partially Threaded70,000199926A14400000
    2"100°
    Undercut
    0.531"0.105"Partially Threaded70,000199926A14500000
     
    5/16"-18
    5/8"100°
    Undercut
    0.656"0.127"Partially Threaded70,000199926A1460000
    3/4"100°
    Undercut
    0.656"0.127"Partially Threaded70,000199926A1470000
    1"100°
    Undercut
    0.656"0.127"Partially Threaded70,000199926A1480000
    1 1/4"100°
    Undercut
    0.656"0.127"Partially Threaded70,000199926A14900000
    1 1/2"100°
    Undercut
    0.656"0.127"Partially Threaded70,000199926A15100000
    1 3/4"100°
    Undercut
    0.656"0.127"Partially Threaded70,000199926A15200000
    2"100°
    Undercut
    0.656"0.127"Partially Threaded70,000199926A15300000
     
    3/8"-16
    3/4"100°
    Undercut
    0.781"0.157"Partially Threaded70,000199926A1540000
    1"100°
    Undercut
    0.781"0.157"Partially Threaded70,000199926A15500000
    1 1/4"100°
    Undercut
    0.781"0.157"Partially Threaded70,000199926A15600000
    1 1/2"100°
    Undercut
    0.781"0.157"Partially Threaded70,000199926A15700000
    1 3/4"100°
    Undercut
    0.781"0.157"Partially Threaded70,000199926A15800000
    2"100°
    Undercut
    0.781"0.157"Partially Threaded70,000199926A15900000
    2 1/2"100°
    Undercut
    0.781"0.157"Partially Threaded70,000199926A16100000
    3"100°
    Undercut
    0.781"0.157"Partially Threaded70,000199926A16200000
     
    1/2"-13
    1"100°
    Undercut
    0.937"0.181"Partially Threaded70,000199926A16300000
    1 1/4"100°
    Undercut
    0.937"0.181"Partially Threaded70,000199926A16400000
    1 1/2"100°
    Undercut
    0.937"0.181"Partially Threaded70,000199926A16500000
    2"100°
    Undercut
    0.937"0.181"Partially Threaded70,000199926A16600000
     
    Highly Corrosion-Resistant 316 Stainless Steel
     
    4-40
    3/16"100°
    Undercut
    0.255"0.059"Fully Threaded70,000590729A61100000
    1/4"100°
    Undercut
    0.255"0.059"Fully Threaded70,000590729A61200000
    5/16"100°
    Undercut
    0.255"0.059"Fully Threaded70,000590729A61300000
    3/8"100°
    Undercut
    0.255"0.059"Fully Threaded70,000590729A61400000
    1/2"100°
    Undercut
    0.255"0.059"Fully Threaded70,000590729A61500000
     
    6-32
    1/4"100°
    Undercut
    0.307"0.066"Fully Threaded70,000590729A11400000
    5/16"100°
    Undercut
    0.307"0.066"Fully Threaded70,000590729A11500000
    3/8"100°
    Undercut
    0.307"0.066"Fully Threaded70,000190729A1110000
    1/2"100°
    Undercut
    0.307"0.066"Fully Threaded70,000190729A1120000
    3/4"100°
    Undercut
    0.307"0.066"Fully Threaded70,000190729A1130000
     
    8-32
    3/8"100°
    Undercut
    0.359"0.076"Fully Threaded70,000190729A2110000
    1/2"100°
    Undercut
    0.359"0.076"Fully Threaded70,000190729A2120000
    3/4"100°
    Undercut
    0.359"0.076"Fully Threaded70,000190729A2130000
     
    10-24
    1/4"82°
    Undercut
    0.411"0.081"Fully Threaded70,000ASME B18.31090585A0250000
     
    10-32
    1/4"82°
    Undercut
    0.411"0.089"Fully Threaded70,000ASME B18.3, ASTM F8792590585A2810000
    3/8"100°
    Undercut
    0.411"0.084"Fully Threaded70,000190729A3140000
    1/2"100°
    Undercut
    0.411"0.084"Fully Threaded70,000190729A3110000
    5/8"100°
    Undercut
    0.411"0.084"Fully Threaded70,000190729A3150000
    3/4"100°
    Undercut
    0.411"0.084"Fully Threaded70,000190729A3120000
    1"100°
    Undercut
    0.411"0.084"Fully Threaded70,000190729A3130000
     
    1/4"-20
    1/4"82°
    Undercut
    0.531"0.107"Fully Threaded70,0001090585A0360000
    1/2"100°
    Undercut
    0.531"0.105"Fully Threaded70,000190729A4110000
    5/8"100°
    Undercut
    0.531"0.105"Fully Threaded70,000190729A4160000
    3/4"100°
    Undercut
    0.531"0.105"Fully Threaded70,000190729A4120000
    1"100°
    Undercut
    0.531"0.105"Fully Threaded70,000190729A4130000
    1 1/4"100°
    Undercut
    0.531"0.105"Fully Threaded70,000190729A4140000
    1 1/2"100°
    Undercut
    0.531"0.105"Fully Threaded70,000190729A41500000
     
    1/4"-28
    1/4"82°
    Undercut
    0.531"0.107"Fully Threaded70,000ASME B18.31090585A0470000
     
    5/16"-18
    3/4"100°
    Undercut
    0.656"0.127"Fully Threaded70,000190729A5110000
    1"100°
    Undercut
    0.656"0.127"Fully Threaded70,000190729A5120000
    1 1/4"100°
    Undercut
    0.656"0.127"Fully Threaded70,000190729A51400000
    1 1/2"100°
    Undercut
    0.656"0.127"Fully Threaded70,000190729A51300000
     
    3/8"-16
    1/2"82°
    Standard
    0.781"0.234"Fully Threaded70,000ASME B18.3590585A0820000
     
    M3 × 0.5 mm
    5 mm100°
    Undercut
    6 mm1.3 mmFully Threaded70,000590729A16500000
    6 mm100°
    Undercut
    6 mm1.3 mmFully Threaded70,000590729A16600000
    8 mm100°
    Undercut
    6 mm1.3 mmFully Threaded70,000590729A16700000
    10 mm100°
    Undercut
    6 mm1.3 mmFully Threaded70,000590729A16800000
    12 mm100°
    Undercut
    6 mm1.3 mmFully Threaded70,000590729A16900000
     
    M4 × 0.7 mm
    6 mm100°
    Undercut
    8 mm1.6 mmFully Threaded70,000190729A2650000
    8 mm100°
    Undercut
    8 mm1.6 mmFully Threaded70,000190729A2660000
    10 mm100°
    Undercut
    8 mm1.6 mmFully Threaded70,000190729A2670000
    12 mm100°
    Undercut
    8 mm1.6 mmFully Threaded70,000190729A2680000
    16 mm100°
    Undercut
    8 mm1.6 mmFully Threaded70,000190729A2690000
     
    M5 × 0.8 mm
    8 mm100°
    Undercut
    10 mm1.9 mmFully Threaded70,000190729A3650000
    10 mm100°
    Undercut
    10 mm1.9 mmFully Threaded70,000190729A3660000
    12 mm100°
    Undercut
    10 mm1.9 mmFully Threaded70,000190729A3670000
    16 mm100°
    Undercut
    10 mm1.9 mmFully Threaded70,000190729A3680000
    20 mm100°
    Undercut
    10 mm1.9 mmFully Threaded70,000190729A3690000
     
    M6 × 1 mm
    12 mm100°
    Undercut
    12 mm2.2 mmFully Threaded70,000190729A4650000
    16 mm100°
    Undercut
    12 mm2.2 mmFully Threaded70,000190729A4660000
    20 mm100°
    Undercut
    12 mm2.2 mmFully Threaded70,000190729A4670000
    25 mm100°
    Undercut
    12 mm2.2 mmFully Threaded70,000190729A4680000
    30 mm100°
    Undercut
    12 mm2.2 mmFully Threaded70,000190729A4690000
     
    M8 × 1.25 mm
    16 mm100°
    Undercut
    16 mm2.8 mmFully Threaded70,000190729A5650000
    20 mm100°
    Undercut
    16 mm2.8 mmFully Threaded70,000190729A5660000
    25 mm100°
    Undercut
    16 mm2.8 mmFully Threaded70,000190729A5670000
    30 mm100°
    Undercut
    16 mm2.8 mmFully Threaded70,000190729A56800000
     
    M10 × 1.5 mm
    16 mm100°
    Undercut
    20 mm3.5 mmFully Threaded70,000ASTM A276190729A61700000
    25 mm100°
    Undercut
    20 mm3.5 mmFully Threaded70,000ASTM A276190729A61900000
    30 mm100°
    Undercut
    20 mm3.5 mmFully Threaded70,000ASTM A276190729A62100000
    35 mm100°
    Undercut
    20 mm3.5 mmFully Threaded70,000ASTM A276190729A62200000
    50 mm100°
    Undercut
    20 mm3.5 mmFully Threaded70,000ASTM A276190729A62400000
     
    M12 × 1.75 mm
    25 mm100°
    Undercut
    24 mm4.2 mmFully Threaded70,000ASTM A276190729A62800000
    30 mm100°
    Undercut
    24 mm4.2 mmFully Threaded70,000ASTM A276190729A62900000
    35 mm100°
    Undercut
    24 mm4.2 mmFully Threaded70,000ASTM A276190729A63100000
     
    Highly Corrosion-Resistant Black-Oxide 316 Stainless Steel
     
    M3 × 0.5 mm
    5 mm100°
    Undercut
    6 mm1.3 mmFully Threaded70,000ASTM A276195440A1010000
    6 mm100°
    Undercut
    6 mm1.3 mmFully Threaded70,000ASTM A276195440A1020000
    8 mm100°
    Undercut
    6 mm1.3 mmFully Threaded70,000ASTM A276195440A1030000
    10 mm100°
    Undercut
    6 mm1.3 mmFully Threaded70,000ASTM A276195440A1040000
    12 mm100°
    Undercut
    6 mm1.3 mmFully Threaded70,000ASTM A276195440A1050000
     
    M4 × 0.7 mm
    6 mm100°
    Undercut
    8 mm1.6 mmFully Threaded70,000ASTM A276195440A1060000
    8 mm100°
    Undercut
    8 mm1.6 mmFully Threaded70,000ASTM A276195440A1070000
    10 mm100°
    Undercut
    8 mm1.6 mmFully Threaded70,000ASTM A276195440A1080000
    12 mm100°
    Undercut
    8 mm1.6 mmFully Threaded70,000ASTM A276195440A1090000
    16 mm100°
    Undercut
    8 mm1.6 mmFully Threaded70,000ASTM A276195440A1100000
     
    M5 × 0.8 mm
    8 mm100°
    Undercut
    10 mm1.9 mmFully Threaded70,000ASTM A276195440A1110000
    10 mm100°
    Undercut
    10 mm1.9 mmFully Threaded70,000ASTM A276195440A1120000
    12 mm100°
    Undercut
    10 mm1.9 mmFully Threaded70,000ASTM A276195440A1130000
    16 mm100°
    Undercut
    10 mm1.9 mmFully Threaded70,000ASTM A276195440A1140000
     
    M6 × 1 mm
    12 mm100°
    Undercut
    12 mm2.2 mmFully Threaded70,000ASTM A276195440A1160000
    16 mm100°
    Undercut
    12 mm2.2 mmFully Threaded70,000ASTM A276195440A1170000
    20 mm100°
    Undercut
    12 mm2.2 mmFully Threaded70,000ASTM A276195440A1180000
    30 mm100°
    Undercut
    12 mm2.2 mmFully Threaded70,000ASTM A276195440A12000000
     
    M8 × 1.25 mm
    16 mm100°
    Undercut
    16 mm2.8 mmFully Threaded70,000ASTM A276195440A1210000
    20 mm100°
    Undercut
    16 mm2.8 mmFully Threaded70,000ASTM A276195440A1220000
    25 mm100°
    Undercut
    16 mm2.8 mmFully Threaded70,000ASTM A276195440A12300000
     

    Steel Hex-Drive Flat Head Screws

    Image of Product. Front orientation. Flat Head Screws. Steel Hex-Drive Flat Head Screws.
    Our strongest hex-drive flat head screws. They're made of alloy steel, so they have nearly twice the tensile strength of other screws. With six contact points, the hex drive withstands more torque than slotted and Phillips to securely grip your driver without slipping and stripping the drive.
    Length is measured from the top of the head.
    Black-Oxide Alloy Steel—Typically chosen for their appearance, these screws have a dark, matte coating to create a finished look. They offer minimal corrosion resistance, so they're best for dry environments.
    Zinc-Plated Alloy Steel—A common choice for areas with occasional exposure to moisture.
    Undercut Profile—About a third thinner than standard heads, the undercut profile fits into shallow holes in thin material. The thin head also has more threading on the shaft, so they're often used to keep short screws from coming loose.
    Head
    Lg.
    Countersink
    Angle
    Flat Head
    Profile
    Dia.
    Ht.
    Threading
    Tensile Strength,
    psi
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    Black-Oxide Alloy Steel
     
    1-64
    1/8"82°
    Undercut
    0.168"0.031"Fully Threaded130,000ASME B18.3, ASTM F8351091253A486000000
     
    3-48
    3/16"82°
    Undercut
    0.187"0.042"Fully Threaded130,000ASTM F8352591253A0930000
     
    4-40
    1/8"82°
    Undercut
    0.255"0.047"Fully Threaded130,000ASTM F8352591253A10200000
     
    5-40
    1/8"82°
    Undercut
    0.281"0.053"Fully Threaded130,000ASTM F8351091253A12200000
     
    6-32
    1/8"82°
    Undercut
    0.262"0.059"Fully Threaded130,000ASTM F8351091253A16300000
    5/32"82°
    Undercut
    0.262"0.059"Fully Threaded130,000ASTM F835591253A1640000
    3/16"82°
    Undercut
    0.262"0.059"Fully Threaded130,000ASTM F8352591253A16500000
     
    8-32
    5/32"82°
    Undercut
    0.312"0.07"Fully Threaded130,000ASTM F8351091253A18500000
    3/16"82°
    Undercut
    0.359"0.07"Fully Threaded130,000ASTM F8352591253A18600000
     
    10-32
    3/16"82°
    Undercut
    0.362"0.081"Fully Threaded130,000ASTM F835591253A26500000
     
    1/4"-20
    1/4"82°
    Undercut
    0.531"0.107"Fully Threaded130,000ASTM F8351091253A53300000
     
    1/4"-28
    1/4"82°
    Undercut
    0.477"0.107"Fully Threaded130,000ASTM F835591253A30400000
     
    3/8"-16
    3/8"82°
    Undercut
    0.717"0.161"Fully Threaded130,000ASTM F835591253A34600000
     
    Zinc-Plated Alloy Steel
     
    6-32
    3/16"82°
    Undercut
    0.307"0.078"Fully Threaded130,000ASTM F8352591263A50500000
     
    8-32
    1/4"82°
    Undercut
    0.359"0.099"Fully Threaded130,000ASTM F83510091263A52100000
     

    Tamper-Resistant Hex-Drive Stainless Steel Flat Head Screws

    Image of Product. Front orientation. Contains Annotated, MultipleImages. Flat Head Screws. Tamper-Resistant Hex-Drive Stainless Steel Flat Head Screws.
    Prevent unauthorized access and damage to components. These screws have a security pin in the drive that you can only turn with a tamper-resistant hex driver. Also known as pin-in-hex and pin-in-socket drives, the deep six-point opening helps them withstand torque without damaging the drive. Made of stainless steel, they won't rust or corrode when exposed to moisture and chemicals.
    Length is measured from the top of 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 can.
    Undercut Profile—About a third thinner than standard heads, the undercut profile fits into shallow holes in thin material. The thin head also has more threading on the shaft, so they're often used to keep short screws from coming loose.
    L-Keys—Turn screws by hand for more control and less chance of overtightening compared to power tools.
    Power Tool Bits—Pair these bits with your power tools to turn screws more quickly than manual tools.
    Screws
    L-Keys
    Power Tool Bits
    Head
    Lg.
    Countersink
    Angle
    Flat Head
    Profile
    Dia.
    Ht.
    Threading
    Tensile Strength,
    psi
    Specs.
    Met
    Pkg.
    Qty.
    Pkg.
    Each
    Each
    18-8 Stainless Steel
     
    6-32
    1/4"82°
    Undercut
    0.307"0.059"Fully Threaded70,000ASME B18.32590517A140000007390A21000007240A3300000
     
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