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    183 Products

    Tamper-Resistant Drilled Spanner Stainless Steel Flat Head Screws

    Image of Product. Front orientation. Contains MultipleImages. Flat Head Screws. Tamper-Resistant Drilled Spanner Stainless Steel Flat Head Screws.
    The unique two-hole design deters tampering. These screws only turn with a drilled spanner driver, making them hard to force with other tools. Also known as pig-nose drives, their two contact points won't withstand much torque, so they're good for light duty tasks. 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.
    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.
    Screwdriver Bits—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
    Screwdriver Bits
    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
     
    4-40
    1/4"82°
    Undercut
    0.225"0.047"Fully Threaded70,000ASME B18.6.325000000000000000000000000000000000000000
    5/16"82°
    Standard
    0.225"0.067"Fully Threaded70,000ASME B18.6.325000000000000000000000000000000000000
    3/8"82°
    Standard
    0.212"0.067"Fully Threaded70,000ASME B18.6.325000000000000000000000000000000000000
    1/2"82°
    Standard
    0.212"0.067"Fully Threaded70,000ASME B18.6.325000000000000000000000000000000000000
     
    6-32
    1/4"82°
    Undercut
    0.262"0.059"Fully Threaded70,000ASME B18.6.325000000000000000000000000000000000000
    5/16"82°
    Standard
    0.279"0.083"Fully Threaded70,000ASME B18.6.325000000000000000000000000000000000000
    3/8"82°
    Standard
    0.262"0.083"Fully Threaded70,000ASME B18.6.325000000000000000000000000000000000000
    1/2"82°
    Standard
    0.262"0.083"Fully Threaded70,000ASME B18.6.325000000000000000000000000000000000000
    5/8"82°
    Standard
    0.279"0.083"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    3/4"82°
    Standard
    0.262"0.083"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    1"82°
    Standard
    0.262"0.083"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    1 1/2"82°
    Standard
    0.262"0.083"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    2"82°
    Standard
    0.262"0.083"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
     
    8-32
    1/4"82°
    Undercut
    0.312"0.070"Fully Threaded70,000ASME B18.6.325000000000000000000000000000000000000
    5/16"82°
    Standard
    0.332"0.100"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    3/8"82°
    Standard
    0.312"0.100"Fully Threaded70,000ASME B18.6.325000000000000000000000000000000000000
    1/2"82°
    Standard
    0.312"0.100"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    5/8"82°
    Standard
    0.332"0.100"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    3/4"82°
    Standard
    0.312"0.100"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    1"82°
    Standard
    0.312"0.100"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    1 1/4"82°
    Standard
    0.312"0.100"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    1 1/2"82°
    Standard
    0.312"0.100"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    2"82°
    Standard
    0.312"0.100"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
     
    10-24
    3/8"82°
    Standard
    0.332"0.116"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    1/2"82°
    Standard
    0.362"0.116"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    5/8"82°
    Standard
    0.362"0.116"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    3/4"82°
    Standard
    0.362"0.116"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    1"82°
    Standard
    0.362"0.116"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    1 1/4"82°
    Standard
    0.362"0.116"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    1 1/2"82°
    Standard
    0.362"0.116"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    2"82°
    Standard
    0.362"0.116"Fully Threaded70,000ASME B18.6.310000000000000000000000000000000000000
     
    10-32
    3/8"82°
    Standard
    0.385"0.116"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    1/2"82°
    Standard
    0.362"0.116"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    5/8"82°
    Standard
    0.385"0.116"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    3/4"82°
    Standard
    0.362"0.116"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    1"82°
    Standard
    0.362"0.116"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    1 1/4"82°
    Standard
    0.362"0.116"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    1 1/2"82°
    Standard
    0.362"0.116"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    2"82°
    Standard
    0.362"0.116"Fully Threaded70,000ASME B18.6.310000000000000000000000000000000000000
    2 1/2"82°
    Standard
    0.362"0.116"Partially Threaded70,000ASME B18.6.310000000000000000000000000000000000000
     
    12-24
    1/2"82°
    Undercut
    0.412"0.092"Fully Threaded70,000ASME B18.6.310000000000000000000000000000000000000
    3/4"82°
    Standard
    0.412"0.132"Fully Threaded70,000ASME B18.6.310000000000000000000000000000000000000
     
    1/4"-20
    1/2"82°
    Undercut
    0.477"0.107"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    5/8"82°
    Standard
    0.507"0.153"Fully Threaded70,000ASME B18.6.310000000000000000000000000000000000000
    3/4"82°
    Standard
    0.477"0.153"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    1"82°
    Standard
    0.477"0.153"Fully Threaded70,000ASME B18.6.3250000000000000000000000000000000000000
    1 1/4"82°
    Standard
    0.477"0.153"Fully Threaded70,000ASME B18.6.310000000000000000000000000000000000000
    1 1/2"82°
    Standard
    0.477"0.153"Fully Threaded70,000ASME B18.6.310000000000000000000000000000000000000
    2"82°
    Standard
    0.477"0.153"Fully Threaded70,000ASME B18.6.310000000000000000000000000000000000000
    2 1/2"82°
    Standard
    0.477"0.153"Partially Threaded70,000ASME B18.6.3100000000000000000000000000000000000000
     
    M3 × 0.5 mm
    6 mm90°
    Standard
    5.59 mm1.65 mmFully Threaded80,00025000000000000000000000000000000000000
    8 mm90°
    Standard
    5.59 mm1.65 mmFully Threaded80,00025000000000000000000000000000000000000
    10 mm90°
    Standard
    5.59 mm1.65 mmFully Threaded80,00025000000000000000000000000000000000000
    12 mm90°
    Standard
    5.59 mm1.65 mmFully Threaded80,00025000000000000000000000000000000000000
     
    M4 × 0.7 mm
    6 mm90°
    Standard
    7.50 mm2.20 mmFully Threaded80,00025000000000000000000000000000000000000
    8 mm90°
    Standard
    7.50 mm2.20 mmFully Threaded80,000250000000000000000000000000000000000000
    10 mm90°
    Standard
    7.50 mm2.20 mmFully Threaded80,000250000000000000000000000000000000000000
    12 mm90°
    Standard
    7.50 mm2.20 mmFully Threaded80,000250000000000000000000000000000000000000
    16 mm90°
    Standard
    7.50 mm2.20 mmFully Threaded80,000250000000000000000000000000000000000000
     
    M5 × 0.8 mm
    8 mm90°
    Standard
    9.19 mm2.50 mmFully Threaded80,000250000000000000000000000000000000000000
    10 mm90°
    Standard
    9.19 mm2.50 mmFully Threaded80,000250000000000000000000000000000000000000
    12 mm90°
    Standard
    9.19 mm2.50 mmFully Threaded80,000250000000000000000000000000000000000000
    16 mm90°
    Standard
    9.19 mm2.50 mmFully Threaded80,000250000000000000000000000000000000000000
    20 mm90°
    Standard
    9.19 mm2.50 mmFully Threaded80,000250000000000000000000000000000000000000
     
    M6 × 1 mm
    12 mm90°
    Standard
    11.00 mm3.00 mmFully Threaded80,000250000000000000000000000000000000000000
    16 mm90°
    Standard
    11.00 mm3.00 mmFully Threaded80,000250000000000000000000000000000000000000
    20 mm90°
    Standard
    11.00 mm3.00 mmFully Threaded80,00010000000000000000000000000000000000000
    25 mm90°
    Standard
    11.00 mm3.00 mmFully Threaded80,00010000000000000000000000000000000000000
    30 mm90°
    Standard
    11.00 mm3.00 mmFully Threaded80,00010000000000000000000000000000000000000
     

    Tamper-Resistant Drilled Spanner Stainless Steel Pan Head Screws

    Image of Product. Front orientation. Rounded Head Screws. Tamper-Resistant Drilled Spanner Stainless Steel Pan Head Screws.
    The unique two-hole design inhibits tampering. These screws only turn with a drilled spanner driver, making them hard to force with other tools. Also known as pig-nose drives, their two contact points won't withstand much torque, so they're good for light duty tasks. Made of stainless steel, they won't rust or corrode when exposed to moisture and chemicals. Pan heads have a moderate height and width profile, offering a middle ground between narrower button heads and wider truss heads.
    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 can.
    Screwdriver Bits—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
    Screwdriver Bits
    Power Tool Bits
    Head
    Lg.
    Dia.
    Ht.
    Threading
    Tensile Strength,
    psi
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    Each
    Each
    18-8 Stainless Steel
     
    4-40
    3/16"0.219"0.068"Fully Threaded80,00025000000000000000000000000000000000000000
    1/4"0.219"0.068"Fully Threaded80,00025000000000000000000000000000000000000
    3/8"0.219"0.068"Fully Threaded80,000ASME B18.6.3250000000000000000000000000000000000000
    1/2"0.219"0.068"Fully Threaded80,000ASME B18.6.3250000000000000000000000000000000000000
    3/4"0.219"0.068"Fully Threaded80,000250000000000000000000000000000000000000
     
    6-32
    3/16"0.27"0.082"Fully Threaded80,000250000000000000000000000000000000000000
    1/4"0.27"0.082"Fully Threaded80,000ASME B18.6.3250000000000000000000000000000000000000
    3/8"0.27"0.082"Fully Threaded80,000ASME B18.6.3250000000000000000000000000000000000000
    1/2"0.27"0.082"Fully Threaded80,000ASME B18.6.3250000000000000000000000000000000000000
    3/4"0.27"0.082"Fully Threaded80,000ASME B18.6.3250000000000000000000000000000000000000
    1"0.27"0.082"Fully Threaded80,000ASME B18.6.3250000000000000000000000000000000000000
     
    8-32
    1/4"0.322"0.096"Fully Threaded80,000250000000000000000000000000000000000000
    3/8"0.322"0.096"Fully Threaded80,000ASME B18.6.3250000000000000000000000000000000000000
    1/2"0.322"0.096"Fully Threaded80,000ASME B18.6.3250000000000000000000000000000000000000
    5/8"0.322"0.096"Fully Threaded80,000250000000000000000000000000000000000000
    3/4"0.322"0.096"Fully Threaded80,000ASME B18.6.3250000000000000000000000000000000000000
    1"0.322"0.096"Fully Threaded80,000ASME B18.6.3250000000000000000000000000000000000000
    1 1/4"0.322"0.096"Fully Threaded80,000ASME B18.6.3250000000000000000000000000000000000000
    1 1/2"0.322"0.096"Fully Threaded80,000ASME B18.6.3250000000000000000000000000000000000000
     
    10-24
    3/8"0.373"0.11"Fully Threaded80,000ASME B18.6.3250000000000000000000000000000000000000
    1/2"0.373"0.11"Fully Threaded80,000ASME B18.6.3250000000000000000000000000000000000000
    3/4"0.373"0.11"Fully Threaded80,000ASME B18.6.3250000000000000000000000000000000000000
    1"0.373"0.11"Fully Threaded80,000ASME B18.6.3250000000000000000000000000000000000000
    1 1/2"0.373"0.11"Fully Threaded80,000ASME B18.6.3250000000000000000000000000000000000000
    2"0.373"0.11"Fully Threaded80,000ASME B18.6.310000000000000000000000000000000000000
     
    10-32
    1/4"0.373"0.11"Fully Threaded80,000250000000000000000000000000000000000000
    3/8"0.373"0.11"Fully Threaded80,000ASME B18.6.3250000000000000000000000000000000000000
    1/2"0.373"0.11"Fully Threaded80,000ASME B18.6.3250000000000000000000000000000000000000
    3/4"0.373"0.11"Fully Threaded80,000ASME B18.6.3250000000000000000000000000000000000000
    1"0.373"0.11"Fully Threaded80,000ASME B18.6.3250000000000000000000000000000000000000
    1 1/2"0.373"0.11"Fully Threaded80,000ASME B18.6.3250000000000000000000000000000000000000
    2"0.373"0.11"Fully Threaded80,000ASME B18.6.310000000000000000000000000000000000000
     
    1/4"-20
    1/4"0.492"0.144"Fully Threaded80,000250000000000000000000000000000000000000
    3/8"0.492"0.144"Fully Threaded80,000ASME B18.6.3250000000000000000000000000000000000000
    1/2"0.492"0.144"Fully Threaded80,000ASME B18.6.3250000000000000000000000000000000000000
    5/8"0.492"0.144"Fully Threaded80,00010000000000000000000000000000000000000
    3/4"0.492"0.144"Fully Threaded80,000ASME B18.6.310000000000000000000000000000000000000
    1"0.492"0.144"Fully Threaded80,000ASME B18.6.310000000000000000000000000000000000000
    1 1/4"0.492"0.144"Fully Threaded80,000100000000000000000000000000000000000000
    1 1/2"0.492"0.144"Fully Threaded80,000ASME B18.6.3100000000000000000000000000000000000000
    2"0.492"0.144"Fully Threaded80,000ASME B18.6.3100000000000000000000000000000000000000
    3"0.492"0.144"Partially Threaded80,000ASME B18.6.3100000000000000000000000000000000000000
     
    1/4"-28
    1/2"0.492"0.144"Fully Threaded80,00010000000000000000000000000000000000000
    3/4"0.492"0.144"Fully Threaded80,00010000000000000000000000000000000000000
    1"0.492"0.144"Fully Threaded80,00010000000000000000000000000000000000000
     
    M3 × 0.5 mm
    6 mm6 mm1.8 mmFully Threaded80,000250000000000000000000000000000000000000
    8 mm6 mm1.8 mmFully Threaded80,000250000000000000000000000000000000000000
    10 mm6 mm1.8 mmFully Threaded80,000250000000000000000000000000000000000000
    12 mm6 mm1.8 mmFully Threaded80,000250000000000000000000000000000000000000
     
    M4 × 0.7 mm
    6 mm8 mm2.4 mmFully Threaded80,000250000000000000000000000000000000000000
    8 mm8 mm2.4 mmFully Threaded80,000250000000000000000000000000000000000000
    10 mm8 mm2.4 mmFully Threaded80,000250000000000000000000000000000000000000
    12 mm8 mm2.4 mmFully Threaded80,000250000000000000000000000000000000000000
    16 mm8 mm2.4 mmFully Threaded80,000250000000000000000000000000000000000000
     
    M5 × 0.8 mm
    8 mm9.98 mm3 mmFully Threaded80,000250000000000000000000000000000000000000
    10 mm9.98 mm3 mmFully Threaded80,000250000000000000000000000000000000000000
    12 mm9.98 mm3 mmFully Threaded80,000250000000000000000000000000000000000000
    16 mm9.98 mm3 mmFully Threaded80,000250000000000000000000000000000000000000
    20 mm9.98 mm3 mmFully Threaded80,000250000000000000000000000000000000000000
     
    M6 × 1 mm
    10 mm11.99 mm3.59 mmFully Threaded80,000250000000000000000000000000000000000000
    12 mm11.99 mm3.59 mmFully Threaded80,000250000000000000000000000000000000000000
    16 mm11.99 mm3.59 mmFully Threaded80,000250000000000000000000000000000000000000
    20 mm11.99 mm3.59 mmFully Threaded80,000250000000000000000000000000000000000000
    25 mm11.99 mm3.59 mmFully Threaded80,00010000000000000000000000000000000000000
     

    Tamper-Resistant Drilled Spanner Stainless Steel Truss Head Screws

    Image of Product. Front orientation. Rounded Head Screws. Tamper-Resistant Drilled Spanner Stainless Steel Truss Head Screws.
    These screws have a wide head that distributes weight and a two-hole design that deters tampering. They only turn with a drilled spanner driver, making them hard to force with other tools. Also known as pig-nose drives, their two contact points won't withstand much torque, so they're good for light duty tasks. Made of stainless steel, they won't rust or corrode when exposed to moisture and chemicals. Their wide head spreads out pressure without adding a washer to reduce the risk of crushing thin material, such as sheet metal.
    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 can.
    Screwdriver Bits—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
    Screwdriver Bits
    Power Tool Bits
    Head
    Lg.
    Dia.
    Ht.
    Threading
    Tensile Strength,
    psi
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    Each
    Each
    18-8 Stainless Steel
     
    6-32
    1/4"0.321"0.086"Fully Threaded70,000250000000000000000000000000000000000000000
    3/8"0.321"0.086"Fully Threaded70,000250000000000000000000000000000000000000
    1/2"0.321"0.086"Fully Threaded70,000250000000000000000000000000000000000000
    3/4"0.321"0.086"Fully Threaded70,000250000000000000000000000000000000000000
    1"0.321"0.086"Fully Threaded70,000250000000000000000000000000000000000000
     
    8-32
    1/4"0.384"0.102"Fully Threaded70,000250000000000000000000000000000000000000
    3/8"0.384"0.102"Fully Threaded70,000250000000000000000000000000000000000000
    1/2"0.384"0.102"Fully Threaded70,000ASME B18.6.310000000000000000000000000000000000000
    3/4"0.384"0.102"Fully Threaded70,000ASME B18.6.310000000000000000000000000000000000000
    1"0.384"0.102"Fully Threaded70,000ASME B18.6.310000000000000000000000000000000000000
    1 1/4"0.384"0.102"Fully Threaded70,000ASME B18.6.310000000000000000000000000000000000000
    1 1/2"0.384"0.102"Fully Threaded70,000ASME B18.6.310000000000000000000000000000000000000
    2 1/2"0.384"0.102"Partially Threaded70,000ASME B18.6.310000000000000000000000000000000000000
     
    10-24
    1/2"0.448"0.128"Fully Threaded70,000ASME B18.6.310000000000000000000000000000000000000
    3/4"0.448"0.128"Fully Threaded70,000ASME B18.6.310000000000000000000000000000000000000
     
    10-32
    1/4"0.448"0.118"Fully Threaded70,000250000000000000000000000000000000000000
    3/8"0.448"0.118"Fully Threaded70,000250000000000000000000000000000000000000
    1/2"0.448"0.118"Fully Threaded70,000250000000000000000000000000000000000000
    3/4"0.448"0.128"Fully Threaded70,000ASME B18.6.310000000000000000000000000000000000000
    1"0.448"0.118"Fully Threaded70,000250000000000000000000000000000000000000
     
    1/4"-20
    3/8"0.573"0.15"Fully Threaded70,000250000000000000000000000000000000000000
    1/2"0.573"0.15"Fully Threaded70,000ASME B18.6.310000000000000000000000000000000000000
    3/4"0.573"0.15"Fully Threaded70,00010000000000000000000000000000000000000
    1"0.573"0.15"Fully Threaded70,000ASME B18.6.310000000000000000000000000000000000000
    1 1/2"0.573"0.15"Fully Threaded70,000100000000000000000000000000000000000000
     
    5/16"-18
    3/4"0.698"0.183"Fully Threaded70,000ASME B18.6.3100000000000000000000000000000000000000
    1"0.698"0.183"Fully Threaded70,000ASME B18.6.310000000000000000000000000000000000000
    1 1/4"0.698"0.183"Fully Threaded70,000ASME B18.6.3100000000000000000000000000000000000000
    1 1/2"0.698"0.183"Fully Threaded70,000ASME B18.6.3100000000000000000000000000000000000000
    2"0.698"0.183"Fully Threaded70,000ASME B18.6.3100000000000000000000000000000000000000
    2 1/2"0.698"0.183"Partially Threaded70,000ASME B18.6.3100000000000000000000000000000000000000
     
    3/8"-16
    3/4"0.823"0.215"Fully Threaded70,000ASME B18.6.3100000000000000000000000000000000000000
    1"0.823"0.215"Fully Threaded70,000ASME B18.6.3100000000000000000000000000000000000000
    1 1/4"0.823"0.215"Fully Threaded70,000ASME B18.6.3100000000000000000000000000000000000000
    1 1/2"0.823"0.215"Fully Threaded70,000ASME B18.6.3100000000000000000000000000000000000000
    2"0.823"0.215"Fully Threaded70,000ASME B18.6.350000000000000000000000000000000000000
    2 1/2"0.823"0.215"Partially Threaded70,000ASME B18.6.350000000000000000000000000000000000000
    3"0.823"0.215"Fully Threaded70,000ASME B18.6.350000000000000000000000000000000000000
     
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