12-24 x 1-1/4 Indented Hex Washer Head 9/16 OD Sealing Washer #5 Point Quad-Coated CSD Self-Drilling Screws

From Industrial Hardware and Specialties is the 12-24 x 1-1/4 Indented Hex Washer Head 9/16 OD Sealing Washer #5 Point Quad-Coated CSD Self-Drilling Screws. These Self-Drilling Screws are designed to be used in applications where metal to metal connections are needed to be made.This self-drilling fastener is made of a quad-coated steel. The quad-coating is a high-grade metal surface processing technology that prevents corrosion. the coating system constists of four layers: a metallic zinc layer, a hex-chromium passivation, a layer of functional nano coating used as a sealer, and a high-grade anti-corrosion chemical conversion film.Salt sprayed tested to 1000 hours, the 355-HA5C has held up to 15 cycles of Kesternich testing, and has acid rain protection. An excellent choice for outdoor and high corrosive applications. These 12-24 self drilling screws have a hex washer head with a 9/16" neoprene-epdm bonded sealing washer and should be installed with a 5/16" indented hex drive. The fastener is 1-1/4" long with a #5 point and a .125 - .500 drill capacity. You can purchase these self-drilling fasteners from Industrial Hardware and Specialties in boxes of 3000 pcs ( 42 lbs.).