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    17 Products
    About Tapping Screws
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    Compare drilling, pointed, thread-forming, and thread-cutting tips to find the best choice for your material.

    Serrated-Flange Hex Head Thread-Forming Structural Screws

    Image of Product. Front orientation. Tapping Screws. Serrated-Flange Hex Head Thread-Forming Structural Screws.
    A five-lobed shank forms clean, uniform threads for a tight hold that prevents loosening and backing out. Also known as Tap-Flex, these screws are hardened steel and meet Grade 5 strength requirements. The serrated flange grips material so screws won't rotate in the hole. Install them with a nutdriver or socket.
    Length is measured from under the flange.
    Corrosion-Resistant-Coated Steel—The coating has been tested to extreme standards, including 1,000 hours of salt spray resistance, to hold up in wet and outdoor environments.
    Head
    Lg.
    Wd.
    Ht.
    Flange
    Dia.
    Tapping
    Screw Type
    Approx. Threads
    per In.
    Drill Bit
    Size
    Shank Cross
    Section
    Each
    Corrosion-Resistant-Coated Steel
     
    3/8" Screw Size
    1 1/2"9/16"0.358"0.78"C168.5 mm
    Five-Lobe94077A10500000
    2"9/16"0.358"0.78"C168.5 mm
    Five-Lobe94077A1150000
    3"9/16"0.358"0.78"C1611/32"
    Five-Lobe94077A4140000
    4"9/16"0.358"0.78"C1611/32"
    Five-Lobe94077A4150000
    5"9/16"0.358"0.78"C1611/32"
    Five-Lobe94077A4160000
     
    1/2" Screw Size
    1 1/2"3/4"0.485"1.04"C1329/64"
    Five-Lobe94077A2050000
    2"3/4"0.485"1.04"C1329/64"
    Five-Lobe94077A2150000
    2 1/2"3/4"0.485"1.04"C1329/64"
    Five-Lobe94077A2250000
    3"3/4"0.4"1.04"C1329/64"
    Five-Lobe94077A4110000
    4"3/4"0.4"1.04"C1329/64"
    Five-Lobe94077A4120000
    5"3/4"0.4"1.04"C1329/64"
    Five-Lobe94077A4130000
     
    5/8" Screw Size
    1 1/2"3/4"0.485"1.04"C1137/64"
    Five-Lobe94077A3050000
    2"3/4"0.485"1.04"C1137/64"
    Five-Lobe94077A3150000
    2 1/2"3/4"0.485"1.04"C1137/64"
    Five-Lobe94077A3250000
    3"15/16"0.501"1.29"C1137/64"
    Five-Lobe94077A4170000
    4"15/16"0.501"1.29"C1137/64"
    Five-Lobe94077A41800000
    5"15/16"0.501"1.29"C1137/64"
    Five-Lobe94077A41900000
     
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