McMaster-Carr logo
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Comments
    E-mail address (if you would like a response)
    199 Products

    Steel Square/Phillips Rounded Head Screws for Plywood and Oriented Strand Board

    Image of Product. Front orientation. Wood Screws. Steel Square/Phillips Rounded Head Screws for Plywood and Oriented Strand Board.
    Image of Specification. Front orientation. Square/Phillips Drive.

    Square/Phillips

    Drive

    Serrated threads on these domed-head screws cut through wood fibers of plywood and oriented strand board (OSB) to minimize splitting. They have a combination drive, so you can use Phillips drivers to tighten them or square drivers if you need more torque.
    Length is measured from under the head.
    Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.
    Head
    Lg.
    Dia.
    Ht.
    Drill Bit
    Size
    Rounded Head
    Profile
    Approx. Threads
    per In.
    Threading
    Tapping
    Method
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
     
    No. 6
    1/2"0.26"0.1"1/16"
    Standard
    18Fully ThreadedThread Forming5091070A11100000
    5/8"0.26"0.1"1/16"
    Standard
    18Fully ThreadedThread Forming5091070A2520000
    3/4"0.26"0.1"1/16"
    Standard
    18Fully ThreadedThread Forming10091070A1510000
     
    No. 8
    3/4"0.33"0.11"5/64"
    Standard
    15Fully ThreadedThread Forming3591070A2540000
    1"0.33"0.11"5/64"
    Standard
    15Fully ThreadedThread Forming3091070A2550000
    1 1/4"0.33"0.11"5/64"
    Standard
    15Fully ThreadedThread Forming3091070A1120000
    1 1/2"0.33"0.11"5/64"
    Standard
    15Fully ThreadedThread Forming2591070A2570000
    2"0.33"0.11"5/64"
    Standard
    15Fully ThreadedThread Forming14091070A25600000
     
    No. 10
    5/8"0.37"0.13"3/32"
    Standard
    13Fully ThreadedThread Forming2591070A2580000
    3/4"0.37"0.13"3/32"
    Standard
    13Fully ThreadedThread Forming2091070A2590000
    1"0.37"0.13"3/32"
    Standard
    13Fully ThreadedThread Forming2091070A2610000
     

    Steel Square-Drive Flat Head Wood Screws

    Image of Product. Front orientation. Wood Screws. Steel Square-Drive Flat Head Wood Screws.
    Avoid slipping when using a lot of torque. These square-drive screws withstand more torque than slotted and Phillips drives. Also known as Robertson-drive screws. The flat head on these screws sits flush, so you won't need to worry about snags.
    Drill a pilot hole slightly smaller than the screw to prevent splitting. Length is measured from the top of the head.
    Black-Oxide 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 Steel—A common choice for areas with occasional exposure to moisture.
    Head
    Lg.
    Dia.
    Ht.
    Softwood
    Drill Bit Size
    Hardwood
    Drill Bit Size
    Countersink
    Angle
    Flat Head
    Profile
    Approx. Threads
    per In.
    Threading
    Tapping
    Method
    Pkg.
    Qty.
    Pkg.
    Black-Oxide Steel
     
    No. 6
    1/2"0.262"0.083"1/16"5/64"82°
    Standard
    18Partially ThreadedThread Forming5090610A711000000
    3/4"0.262"0.083"1/16"5/64"82°
    Standard
    18Partially ThreadedThread Forming5090610A71200000
    1"0.262"0.083"1/16"5/64"82°
    Standard
    18Partially ThreadedThread Forming5090610A71300000
    1 1/4"0.262"0.083"1/16"5/64"82°
    Standard
    18Partially ThreadedThread Forming2590610A71400000
    1 1/2"0.262"0.083"1/16"5/64"82°
    Standard
    18Partially ThreadedThread Forming2590610A71500000
     
    No. 8
    3/4"0.312"0.1"5/64"3/32"82°
    Standard
    15Partially ThreadedThread Forming5090610A71700000
    1"0.332"0.1"5/64"3/32"82°
    Standard
    15Partially ThreadedThread Forming2590610A71800000
    1 1/4"0.332"0.1"5/64"3/32"82°
    Standard
    15Partially ThreadedThread Forming1090610A7190000
    1 1/2"0.332"0.1"5/64"3/32"82°
    Standard
    15Partially ThreadedThread Forming2590610A72100000
    2"0.332"0.1"5/64"3/32"82°
    Standard
    15Partially ThreadedThread Forming1090610A7220000
    2 1/2"0.332"0.1"5/64"3/32"82°
    Standard
    15Partially ThreadedThread Forming1090610A72300000
    3"0.332"0.1"5/64"3/32"82°
    Standard
    15Partially ThreadedThread Forming590610A7240000
     
    No. 10
    1"0.362"0.116"3/32"7/64"82°
    Standard
    13Partially ThreadedThread Forming2590610A72500000
    1 1/4"0.385"0.116"3/32"7/64"82°
    Standard
    13Partially ThreadedThread Forming1090610A7260000
    1 1/2"0.385"0.116"3/32"7/64"82°
    Standard
    13Partially ThreadedThread Forming1090610A7270000
    2"0.385"0.116"3/32"7/64"82°
    Standard
    13Partially ThreadedThread Forming1090610A72800000
    2 1/2"0.385"0.116"3/32"7/64"82°
    Standard
    13Partially ThreadedThread Forming590610A7290000
    3"0.385"0.116"3/32"7/64"82°
    Standard
    13Partially ThreadedThread Forming590610A7310000
     
    No. 12
    1 1/2"0.438"0.132"7/64"1/8"82°
    Standard
    11Partially ThreadedThread Forming1090610A73200000
    2"0.412"0.132"7/64"1/8"82°
    Standard
    11Partially ThreadedThread Forming590610A7330000
    2 1/2"0.438"0.132"7/64"1/8"82°
    Standard
    11Partially ThreadedThread Forming590610A7340000
    3"0.412"0.132"7/64"1/8"82°
    Standard
    11Partially ThreadedThread Forming590610A73500000
     
    No. 14
    2"0.507"0.153"7/64"9/64"82°
    Standard
    10Partially ThreadedThread Forming590610A7360000
    3"0.507"0.153"7/64"9/64"82°
    Standard
    10Partially ThreadedThread Forming590610A73700000
    4"0.507"0.153"7/64"9/64"82°
    Standard
    10Partially ThreadedThread Forming190610A7380000
     
    Zinc-Plated Steel
     
    No. 4
    1/2"0.225"0.067"3/64"1/16"82°
    Standard
    22Partially ThreadedThread Forming10090610A1100000
    3/4"0.225"0.067"3/64"1/16"82°
    Standard
    22Partially ThreadedThread Forming10090610A1130000
    1"0.225"0.067"3/64"1/16"82°
    Standard
    22Partially ThreadedThread Forming10090610A1150000
     
    No. 6
    1/2"0.262"0.083"1/16"5/64"82°
    Standard
    18Partially ThreadedThread Forming10090610A14800000
    3/4"0.262"0.083"1/16"5/64"82°
    Standard
    18Partially ThreadedThread Forming10090610A15100000
    1"0.262"0.083"1/16"5/64"82°
    Standard
    18Partially ThreadedThread Forming10090610A15300000
    1 1/4"0.262"0.083"1/16"5/64"82°
    Standard
    18Partially ThreadedThread Forming10090610A15500000
    1 1/2"0.262"0.083"1/16"5/64"82°
    Standard
    18Partially ThreadedThread Forming10090610A15700000
     
    No. 8
    1/2"0.332"0.1"5/64"3/32"82°
    Standard
    15Partially ThreadedThread Forming10090610A1940000
    3/4"0.312"0.1"5/64"3/32"82°
    Standard
    15Partially ThreadedThread Forming10090610A19700000
    1"0.332"0.1"5/64"3/32"82°
    Standard
    15Partially ThreadedThread Forming10090610A19900000
    1 1/4"0.332"0.1"5/64"3/32"82°
    Standard
    15Partially ThreadedThread Forming10090610A20100000
    1 1/2"0.332"0.1"5/64"3/32"82°
    Standard
    15Partially ThreadedThread Forming5090610A2030000
    2"0.332"0.1"5/64"3/32"82°
    Standard
    15Partially ThreadedThread Forming5090610A20500000
    2 1/2"0.332"0.1"5/64"3/32"82°
    Standard
    15Partially ThreadedThread Forming5090610A60700000
    3"0.332"0.1"5/64"3/32"82°
    Standard
    15Partially ThreadedThread Forming2590610A6090000
     
    No. 10
    3/4"0.385"0.116"3/32"7/64"82°
    Standard
    13Partially ThreadedThread Forming5090610A2450000
    1"0.362"0.116"3/32"7/64"82°
    Standard
    13Partially ThreadedThread Forming10090610A24700000
    1 1/4"0.385"0.116"3/32"7/64"82°
    Standard
    13Partially ThreadedThread Forming10090610A24900000
    1 1/2"0.385"0.116"3/32"7/64"82°
    Standard
    13Partially ThreadedThread Forming5090610A2510000
    1 3/4"0.385"0.116"3/32"7/64"82°
    Standard
    13Partially ThreadedThread Forming5090610A65200000
    2"0.385"0.116"3/32"7/64"82°
    Standard
    13Partially ThreadedThread Forming5090610A25300000
    2 1/2"0.385"0.116"3/32"7/64"82°
    Standard
    13Partially ThreadedThread Forming2590610A6550000
    3"0.385"0.116"3/32"7/64"82°
    Standard
    13Partially ThreadedThread Forming2590610A6570000
     
    No. 12
    1"0.412"0.132"7/64"1/8"82°
    Standard
    11Partially ThreadedThread Forming5090610A29600000
    1 1/2"0.438"0.132"7/64"1/8"82°
    Standard
    11Partially ThreadedThread Forming5090610A29900000
    2"0.412"0.132"7/64"1/8"82°
    Standard
    11Partially ThreadedThread Forming5090610A68100000
    2 1/2"0.438"0.132"7/64"1/8"82°
    Standard
    11Partially ThreadedThread Forming2590610A68300000
    3"0.412"0.132"7/64"1/8"82°
    Standard
    11Partially ThreadedThread Forming2590610A68500000
     
    No. 14
    1 1/2"0.507"0.153"7/64"9/64"82°
    Standard
    10Partially ThreadedThread Forming5090610A53000000
    2"0.507"0.153"7/64"9/64"82°
    Standard
    10Partially ThreadedThread Forming5090610A56000000
    2 1/2"0.507"0.153"7/64"9/64"82°
    Standard
    10Partially ThreadedThread Forming2590610A59000000
    3"0.507"0.153"7/64"9/64"82°
    Standard
    10Partially ThreadedThread Forming1090610A62000000
    4"0.507"0.153"7/64"9/64"82°
    Standard
    10Partially ThreadedThread Forming1090610A65000000
     

    Stainless Steel Square-Drive Flat Head Screws for Wood and Composite Wood

    Image of Product. Front orientation. Wood Screws. Stainless Steel Square-Drive Flat Head Screws for Wood and Composite Wood.
    Fasten decking and fencing outdoors with screws that won't rust. They're often used with chemically treated wood, such as ACQ-treated (arsenic-free) lumber. Also known as deck screws, their trumpet shape spreads pressure to prevent splitting, while the flat head limits snags. The square drive handles more torque than slotted and Phillips drives.
    The screw drill tip acts as a built-in pilot, though pilot holes are still recommended near edges to avoid splitting. Length is measured from the top of the head.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these screws resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.
    316 Stainless Steel—Superior to 18-8 stainless steel, these screws won't degrade when exposed to harsh weather, salt water, and most chemicals.
    Head
    Lg.
    Dia.
    Ht.
    Drill Bit
    Size
    Flat Head
    Profile
    Approx. Threads
    per In.
    Threading
    Tapping
    Method
    Tapping
    Screw Type
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
     
    No. 6
    5/8"0.344"0.197"1/16"
    Standard
    9Partially ThreadedThread Cutting1710090000A143000000
    3/4"0.344"0.197"1/16"
    Standard
    9Partially ThreadedThread Cutting1710090000A14700000
    1"0.344"0.197"1/16"
    Standard
    9Partially ThreadedThread Cutting1710090000A15100000
    1 1/4"0.344"0.197"1/16"
    Standard
    9Partially ThreadedThread Cutting1710090000A15500000
    1 1/2"0.344"0.197"1/16"
    Standard
    18Partially ThreadedThread Cutting1710090000A15700000
    1 5/8"0.344"0.197"1/16"
    Standard
    9Partially ThreadedThread Cutting1710090000A15900000
    2"0.344"0.197"1/16"
    Standard
    18Partially ThreadedThread Cutting1710090000A16100000
     
    No. 7
    1"0.23"0.125"1/16"
    Narrow
    10Partially ThreadedThread Cutting175091530A77100000
    1 5/8"0.23"0.125"1/16"
    Narrow
    10Partially ThreadedThread Cutting175091530A77400000
    2"0.23"0.125"1/16"
    Narrow
    10Partially ThreadedThread Cutting175091530A77600000
    2 1/4"0.23"0.125"1/16"
    Narrow
    10Partially ThreadedThread Cutting175091530A77800000
    2 1/2"0.23"0.125"1/16"
    Narrow
    10Partially ThreadedThread Cutting175091530A78200000
    3"0.23"0.125"1/16"
    Narrow
    10Partially ThreadedThread Cutting172591530A40000000
     
    No. 8
    3/4"0.344"0.192"5/64"
    Standard
    8Partially ThreadedThread Cutting1710090000A18800000
    1"0.344"0.192"5/64"
    Standard
    15Partially ThreadedThread Cutting1710090000A2110000
    1 1/4"0.344"0.192"5/64"
    Standard
    8Partially ThreadedThread Cutting1710090000A19600000
    1 1/2"0.344"0.192"5/64"
    Standard
    15Partially ThreadedThread Cutting1710090000A21200000
    1 5/8"0.344"0.192"5/64"
    Standard
    8Partially ThreadedThread Cutting175090000A20000000
    1 3/4"0.344"0.192"5/64"
    Standard
    15Partially ThreadedThread Cutting1710090000A21300000
    2"0.344"0.192"5/64"
    Standard
    8Partially ThreadedThread Cutting175090000A20500000
    2 1/2"0.344"0.192"5/64"
    Standard
    8Partially ThreadedThread Cutting175090000A21500000
    2 3/4"0.344"0.192"5/64"
    Standard
    15Partially ThreadedThread Cutting175090000A21400000
    3"0.344"0.192"5/64"
    Standard
    8Partially ThreadedThread Cutting175090000A21900000
     
    No. 9
    4"0.25"0.125"5/64"
    Narrow
    14Partially ThreadedThread Cutting171091530A4250000
     
    No. 10
    1"0.344"0.189"3/32"
    Standard
    8Partially ThreadedThread Cutting1710090000A22000000
    1 1/4"0.344"0.189"3/32"
    Standard
    8Partially ThreadedThread Cutting1710090000A22200000
    1 1/2"0.344"0.189"3/32"
    Standard
    8Partially ThreadedThread Cutting175090000A22400000
    1 5/8"0.344"0.189"3/32"
    Standard
    13Partially ThreadedThread Cutting175090000A31100000
    1 3/4"0.344"0.189"3/32"
    Standard
    8Partially ThreadedThread Cutting175090000A22600000
    2"0.344"0.189"3/32"
    Standard
    8Partially ThreadedThread Cutting175090000A22800000
    2 1/4"0.344"0.189"3/32"
    Standard
    13Partially ThreadedThread Cutting175090000A31200000
    2 1/2"0.344"0.189"3/32"
    Standard
    8Partially ThreadedThread Cutting172590000A25500000
    2 3/4"0.344"0.189"3/32"
    Standard
    13Partially ThreadedThread Cutting172590000A3130000
    3"0.344"0.189"3/32"
    Standard
    8Partially ThreadedThread Cutting172590000A25700000
    3 3/4"0.344"0.189"3/32"
    Standard
    8Partially ThreadedThread Cutting172590000A26500000
    4"0.344"0.189"3/32"
    Standard
    13Partially ThreadedThread Cutting172590000A31400000
     
    No. 12
    2"0.43"0.203"7/64"
    Standard
    11Partially ThreadedThread Cutting172590000A6120000
    2 1/2"0.43"0.203"7/64"
    Standard
    7Partially ThreadedThread Cutting172590000A60100000
    4"0.43"0.203"7/64"
    Standard
    7Partially ThreadedThread Cutting171090000A61600000
    4 1/2"0.43"0.203"7/64"
    Standard
    7Partially ThreadedThread Cutting171090000A62200000
    5 1/2"0.43"0.203"7/64"
    Standard
    11Partially ThreadedThread Cutting171090000A6130000
    6"0.43"0.203"7/64"
    Standard
    7Partially ThreadedThread Cutting171090000A63300000
     
    No. 14
    2"0.43"0.25"7/64"
    Standard
    10Partially ThreadedThread Cutting172590000A71100000
    2 1/2"0.43"0.25"7/64"
    Standard
    10Partially ThreadedThread Cutting171090000A7120000
    3"0.43"0.25"7/64"
    Standard
    10Partially ThreadedThread Cutting171090000A7130000
    3 1/2"0.43"0.25"7/64"
    Standard
    7Partially ThreadedThread Cutting171090000A74400000
    4"0.43"0.25"7/64"
    Standard
    7Partially ThreadedThread Cutting171090000A74900000
    4 1/2"0.43"0.25"7/64"
    Standard
    10Partially ThreadedThread Cutting171090000A71400000
    5"0.43"0.25"7/64"
    Standard
    7Partially ThreadedThread Cutting171090000A75500000
    6"0.43"0.25"7/64"
    Standard
    10Partially ThreadedThread Cutting17590000A7150000
     
    316 Stainless Steel
     
    No. 6
    1 1/4"0.344"0.197"1/16"
    Standard
    18Partially ThreadedThread Cutting175090000A4010000
    1 5/8"0.344"0.197"1/16"
    Standard
    18Partially ThreadedThread Cutting175090000A4020000
    2"0.344"0.197"1/16"
    Standard
    18Partially ThreadedThread Cutting175090000A4030000
     
    No. 7
    1 5/8"0.23"0.125"1/16"
    Narrow
    16Partially ThreadedThread Cutting175090076A71000000
    2 1/4"0.23"0.125"1/16"
    Narrow
    16Partially ThreadedThread Cutting172590076A72000000
    3"0.23"0.125"1/16"
    Narrow
    16Partially ThreadedThread Cutting172590076A73000000
     
    No. 8
    1 1/4"0.344"0.192"5/64"
    Standard
    15Partially ThreadedThread Cutting175090000A28100000
    1 1/2"0.344"0.192"5/64"
    Standard
    15Partially ThreadedThread Cutting175090000A4040000
    1 5/8"0.344"0.192"5/64"
    Standard
    15Partially ThreadedThread Cutting175090000A29000000
    2"0.344"0.192"5/64"
    Standard
    15Partially ThreadedThread Cutting175090000A29100000
    2 1/4"0.344"0.192"5/64"
    Standard
    15Partially ThreadedThread Cutting175090000A40500000
    3"0.344"0.192"5/64"
    Standard
    15Partially ThreadedThread Cutting172590000A4060000
     
    No. 10
    1 5/8"0.344"0.189"3/32"
    Standard
    13Partially ThreadedThread Cutting172590000A4070000
    2 1/2"0.344"0.189"3/32"
    Standard
    13Partially ThreadedThread Cutting172590000A29300000
    3"0.344"0.189"3/32"
    Standard
    13Partially ThreadedThread Cutting172590000A29400000
    3 1/2"0.344"0.189"3/32"
    Standard
    13Partially ThreadedThread Cutting172590000A29500000
    4"0.344"0.189"3/32"
    Standard
    13Partially ThreadedThread Cutting171090000A4080000
     
    No. 12
    2"0.43"0.203"7/64"
    Standard
    11Partially ThreadedThread Cutting171090000A4090000
    2 1/2"0.43"0.203"7/64"
    Standard
    11Partially ThreadedThread Cutting172590000A29700000
    3"0.43"0.203"7/64"
    Standard
    11Partially ThreadedThread Cutting172590000A29800000
    4"0.43"0.203"7/64"
    Standard
    11Partially ThreadedThread Cutting171090000A3000000
    4 1/2"0.43"0.203"7/64"
    Standard
    11Partially ThreadedThread Cutting171090000A30300000
    5"0.43"0.203"7/64"
    Standard
    11Partially ThreadedThread Cutting171090000A30500000
     
    No. 14
    3"0.43"0.25"7/64"
    Standard
    10Partially ThreadedThread Cutting171090000A4110000
    4"0.43"0.25"7/64"
    Standard
    10Partially ThreadedThread Cutting17590000A4130000
    5"0.43"0.25"7/64"
    Standard
    10Partially ThreadedThread Cutting17590000A4140000
    6"0.43"0.25"7/64"
    Standard
    10Partially ThreadedThread Cutting17590000A4150000
     

    Steel Square/Phillips Flat Head Screws for Plywood and Oriented Strand Board

    Image of Product. Front orientation. Wood Screws. Steel Square/Phillips Flat Head Screws for Plywood and Oriented Strand Board.
    Image of Specification. Front orientation. Square/Phillips Drive.

    Square/Phillips

    Drive

    Serrated threads cut through wood fibers of plywood and oriented strand board (OSB) to minimize splitting, and the flat head deters snags. These screws have a combination drive, so you can use Phillips drivers to tighten them or square drivers if you need more torque.
    Length is measured from under the head.
    Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.
    Head
    Lg.
    Dia.
    Ht.
    Drill Bit
    Size
    Countersink
    Angle
    Flat Head
    Profile
    Approx. Threads
    per In.
    Threading
    Tapping
    Method
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
     
    No. 6
    1/2"0.3"0.1"1/16"
    90°
    Standard
    12Fully ThreadedThread Forming5091550A31600000
    5/8"0.3"0.1"1/16"
    90°
    Standard
    12Fully ThreadedThread Forming5091550A3010000
    3/4"0.3"0.1"1/16"
    90°
    Standard
    12Fully ThreadedThread Forming4591550A3020000
    1"0.3"0.1"1/16"
    90°
    Standard
    12Fully ThreadedThread Forming4091550A3030000
    1 1/4"0.3"0.1"1/16"
    90°
    Standard
    12Fully ThreadedThread Forming3591550A3040000
    1 1/2"0.3"0.1"1/16"
    90°
    Standard
    12Fully ThreadedThread Forming3091550A3050000
     
    No. 8
    5/8"0.3"0.11"5/64"
    90°
    Standard
    11Fully ThreadedThread Forming4091550A3180000
    3/4"0.3"0.11"5/64"
    90°
    Standard
    11Fully ThreadedThread Forming3591550A3080000
    1"0.3"0.11"5/64"
    90°
    Standard
    11Fully ThreadedThread Forming7591550A30700000
    1 1/4"0.3"0.11"5/64"
    90°
    Standard
    11Fully ThreadedThread Forming3091550A3190000
    1 1/2"0.3"0.11"5/64"
    90°
    Standard
    11Fully ThreadedThread Forming2591550A3090000
    1 3/4"0.3"0.11"5/64"
    90°
    Standard
    11Fully ThreadedThread Forming2091550A3210000
    2"0.3"0.11"5/64"
    90°
    Standard
    11Fully ThreadedThread Forming2091550A3170000
    2 1/2"0.3"0.11"5/64"
    90°
    Standard
    11Partially ThreadedThread Forming13391550A32200000
     
    No. 10
    3/4"0.4"0.13"3/32"
    90°
    Standard
    8 1/2Fully ThreadedThread Forming2591550A3110000
    1"0.4"0.13"3/32"
    90°
    Standard
    8 1/2Fully ThreadedThread Forming2091550A3120000
    1 1/4"0.4"0.13"3/32"
    90°
    Standard
    8 1/2Fully ThreadedThread Forming2091550A3130000
    1 1/2"0.4"0.13"3/32"
    90°
    Standard
    8 1/2Fully ThreadedThread Forming13091550A31400000
    2"0.4"0.13"3/32"
    90°
    Standard
    8 1/2Fully ThreadedThread Forming10591550A31500000
    2 1/2"0.4"0.13"3/32"
    90°
    Standard
    8 1/2Fully ThreadedThread Forming8891550A32300000
    3"0.4"0.13"3/32"
    90°
    Standard
    8 1/2Partially ThreadedThread Forming7291550A32400000
    3 1/2"0.4"0.13"3/32"
    90°
    Standard
    8 1/2Partially ThreadedThread Forming5791550A32500000
     

    Serrated Stainless Steel Square-Drive Flat Head Wood Screws

    Image of Product. Front orientation. Wood Screws. Serrated Stainless Steel Square-Drive Flat Head Wood Screws.
    Lock in for a tighter hold than typical wood screws. Serrations beneath the flat head dig into wood to secure these screws into place. Made of stainless steel, they won't degrade from moisture or chemically treated wood, such as ACQ-treated (arsenic-free) lumber. Also known as a Robertson drive, the square drive handles more torque than slotted and Phillips drives, so it's less likely to slip.
    The screw drill tip acts as a built-in pilot, though pilot holes are still recommended near edges to avoid splitting. Length is measured from the top of the head.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these screws resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.
    Head
    Lg.
    Dia.
    Ht.
    Drill Bit
    Size
    Countersink
    Angle
    Flat Head
    Profile
    Approx. Threads
    per In.
    Threading
    Tapping
    Method
    Tapping
    Screw Type
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
     
    No. 6
    1 5/8"0.279"0.083"32 Ga.
    90°
    Standard
    9Partially ThreadedThread Cutting172598643A65100000
     
    No. 8
    1 1/4"0.311"0.088"29 Ga.
    90°
    Standard
    8Partially ThreadedThread Cutting172598643A6520000
    1 1/2"0.311"0.088"29 Ga.
    90°
    Standard
    8Partially ThreadedThread Cutting172598643A65300000
    1 5/8"0.311"0.088"3/32"
    90°
    Standard
    15Partially ThreadedThread Cutting172598643A3500000
    1 3/4"0.311"0.088"29 Ga.
    90°
    Standard
    8Partially ThreadedThread Cutting172598643A65400000
    2"0.311"0.088"3/32"
    90°
    Standard
    15Partially ThreadedThread Cutting172598643A37000000
    2 1/2"0.311"0.088"3/32"
    90°
    Standard
    15Partially ThreadedThread Cutting171098643A3900000
    3"0.311"0.088"29 Ga.
    90°
    Standard
    8Partially ThreadedThread Cutting171098643A6550000
     
    No. 10
    2 1/2"0.378"0.11"7/64"
    90°
    Standard
    13Partially ThreadedThread Cutting171098643A6100000
    3"0.378"0.11"7/64"
    90°
    Standard
    13Partially ThreadedThread Cutting171098643A6400000
    3 1/2"0.378"0.11"24 Ga.
    90°
    Standard
    8Partially ThreadedThread Cutting171098643A65600000
    4"0.378"0.11"24 Ga.
    90°
    Standard
    8Partially ThreadedThread Cutting17598643A6570000
     

    Brass Square-Drive Flat Head Wood Screws

    Image of Product. Front orientation. Wood Screws. Brass Square-Drive Flat Head Wood Screws.
    These screws offer a shiny look, resist rust in wet environments, and have a flat head that sits flush to prevent snags. Also known as a Robertson drive, the square drive handles more torque than slotted and Phillips drives, so it's less likely to slip.
    Drill a pilot hole slightly smaller than the screw to prevent splitting. Length is measured from the top of the head.
    Head
    Lg.
    Dia.
    Ht.
    Softwood
    Drill Bit Size
    Hardwood
    Drill Bit Size
    Countersink
    Angle
    Flat Head
    Profile
    Approx. Threads
    per In.
    Threading
    Tapping
    Method
    Pkg.
    Qty.
    Pkg.
    Brass
     
    No. 6
    3/4"0.279"0.083"1/16"5/64"82°
    Standard
    18Partially ThreadedThread Forming10095188A310000000
    1"0.279"0.083"1/16"5/64"82°
    Standard
    18Partially ThreadedThread Forming10095188A32000000
    1 1/4"0.279"0.083"1/16"5/64"82°
    Standard
    18Partially ThreadedThread Forming5095188A33000000
     
    No. 8
    3/4"0.332"0.1"5/64"3/32"82°
    Standard
    15Partially ThreadedThread Forming5095188A44000000
    1"0.332"0.1"5/64"3/32"82°
    Standard
    15Partially ThreadedThread Forming5095188A45000000
    1 1/4"0.332"0.1"5/64"3/32"82°
    Standard
    15Partially ThreadedThread Forming5095188A46000000
     

    Sealing Screws for Wood and Composite Wood

    Image of Product. Front orientation. Wood Screws. Sealing Screws for Wood and Composite Wood.
    Prevent rot in roofs, decks, and outdoor posts. The rubber-backed washer in these screws keeps fluid out of fastened joints. They're made of stainless steel, so they won't degrade from chemically treated wood, such as ACQ-treated (arsenic-free) lumber. Also known as trim head screws, they exert less pressure on surfaces to curb splitting and distortion. The square drive handles more torque than slotted and Phillips drives, so it's less likely to slip.
    The screw drill tip acts as a built-in pilot, though pilot holes are still recommended near edges to avoid splitting. Length is measured from the top of the head.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these screws resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.
    Head
    Washer
    Lg.
    Dia.
    Ht.
    Drill Bit
    Size
    Flat Head
    Profile
    Approx. Threads
    per In.
    Threading
    OD
    Thk.
    Tapping
    Method
    Tapping
    Screw Type
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel with Stainless Steel and Rubber Washer
     
    No. 7
    1"0.23"0.125"1/16"
    Standard
    16Partially Threaded0.63"0.2"Thread Cutting172591540A100000000
    1 5/8"0.23"0.125"1/16"
    Standard
    16Partially Threaded0.63"0.2"Thread Cutting172591540A20000000
    2 1/4"0.23"0.125"1/16"
    Standard
    16Partially Threaded0.63"0.2"Thread Cutting171091540A30000000
    3"0.23"0.125"1/16"
    Standard
    16Partially Threaded0.63"0.2"Thread Cutting171091540A40000000
     

    Steel Rounded Head Screws for Joining Plastic to Wood

    Image of Product. Front orientation. Tapping Screws. Steel Rounded Head Screws for Joining Plastic to Wood.
    Mount plastic panels to wood with screws that prevent cracking and warping. Wings under the head cut a hole slightly larger than the threads, so the plastic can expand and contract as temperatures change. The threads engage only with the wood below, leaving space for the plastic. Screws have a washer made from aluminum and rubber bonded to steel for a watertight seal. The Phillips drive handles enough torque to keep drivers from slipping and the rounded head creates a finished look.
    Length is measured from under the head.
    Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.
    Head
    Lg.
    Dia.
    Ht.
    Approx. Threads
    per In.
    Washer Material
    Washer
    OD
    Washer
    Thk.
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
     
    No. 12 Screw Size
    1 1/4"0.438"0.075"11Aluminum/Rubber/Steel0.551"0.13"2592879A167000000
    2"0.438"0.075"11Aluminum/Rubber/Steel0.551"0.13"2592879A17000000
     

    Steel Square-Drive Flat Head Screws for Wood and Composite Wood

    Image of Product. Front orientation. Wood Screws. Steel Square-Drive Flat Head Screws for Wood and Composite Wood.
    The thin head reduces surface damage and leaves a smooth, near-invisible finish on trim, drywall, and other surfaces. These screws have a square drive that handles more torque than slotted and Phillips drives. Their flat head sits flush so they won't snag.
    Drill a pilot hole slightly smaller than the screw to prevent splitting. Length is measured from the top of the head.
    Black Phosphate-Coated Steel—More corrosion resistant than black-oxide steel, these screws are suitable for environments with minimal moisture. They have a dark, matte coating to create a finished look.
    Head
    Lg.
    Dia.
    Ht.
    Drill Bit
    Size
    Flat Head
    Profile
    Approx. Threads
    per In.
    Threading
    Tapping
    Method
    Pkg.
    Qty.
    Pkg.
    Black Phosphate-Coated Steel
     
    No. 6
    1 5/8"0.224"0.135"1/16"
    Narrow
    18Partially ThreadedThread Forming10091520A150000000
    2 1/4"0.224"0.135"1/16"
    Narrow
    18Partially ThreadedThread Forming10091520A16000000
     
    No. 8
    3"0.264"0.155"5/64"
    Narrow
    15Partially ThreadedThread Forming5091520A17100000
     

    Stainless Steel Square/Phillips Flat Head Screws for Plywood and Oriented Strand Board

    Image of Product. Front orientation. Wood Screws. Stainless Steel Square/Phillips Flat Head Screws for Plywood and Oriented Strand Board.
    Image of Specification. Front orientation. Square/Phillips Drive.

    Square/Phillips

    Drive

    Fasten plywood and oriented strand board your way with these rust-resistant screws. They have a combination drive, so you can use Phillips drivers to tighten them or square drivers if you need more torque. The flat head sits flush to prevent snags, while serrated threads cut through wood fibers to minimize splitting. Often used in exterior panels, they won't degrade from moisture or chemically treated wood.
    Length is measured from under the head.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these screws resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.
    Head
    Lg.
    Dia.
    Ht.
    Drill Bit
    Size
    Countersink
    Angle
    Flat Head
    Profile
    Approx. Threads
    per In.
    Threading
    Tapping
    Method
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
     
    No. 9
    1 1/2"0.346"0.143"5/64"
    82°
    Standard
    14Partially ThreadedThread Forming5090027A211000000
     
    No. 10
    2 1/2"0.348"0.134"3/32"
    82°
    Standard
    13Partially ThreadedThread Forming2590027A25000000
    3"0.348"0.134"3/32"
    82°
    Standard
    13Partially ThreadedThread Forming2590027A25500000
     
    back to top