Acorn International SW-MW1415G250 Screw, #14 Thread, High-Low, Twin Lead Thread, Hex Drive, Self-Tapping, Type 17 Point

#14-14 metal to wood screws are sealing self-piercing tapping screws made from heat treated C1022 steel, case hardened for roofing and siding applications. #14 screws are used in high wind areas as well as for replacement or as "goof screws". A 5/16 in across flats high hat hex washer head with assembled EPDM washer offers easy driving and conforms to the metal surface for a secure and long-lasting seal. The twin lead type 17 point and hi-lo threads offer faster drive time and greater resistance to pullout. All screws are 1,000 hrs salt spray test dacro-coated. All Acorn International screws are packed 250 pieces in a heavy-duty tear-off resealable bag, UPC coded and retail ready. All bag and carton labels are trilingual. Cartons are heavy-duty cardboard of uniform size and distinctive yellow color for better retail identity.