The washer and hex head are formed together as one piece. Ideal for metal structures and assemblies. Hex Head Self Drilling Screws Steel Self-Drilling Screw, Black Zinc Plated Finish, Hex Washer Head, Hex Drive, #2 Drill Point, #8-18 Thread Size, 1-1/4" Length (Pack Of 100) : Small Parts Stainless Steel Hex Head Screws When you drive this screw, a flexible black EPDM rubber washer bonded to a metal washer compresses, forming a tight seal. Hex head for easy driving Head height includes compressible washer. Steels are designated by a 4 number SAE Steel grade. is vital to a modern, sustainable society. The same that enables manufacturers to make lighter, more fuel-efficient vehicles, and taller, safer structures is also continuously recyclable Zinc Coating Hex Washer Head Self Drilling Screw at best price in New Delhi Length is measured from under washer., Fully threaded.  Zinc Plating helps to prevent corrosion. Hex Head Self Drilling Screw - Lituo Fasteners Manufacturer  The steel used in these fasteners has a tensile strength ranging from 100,000 to 150,000 psi (pounds per square inch). For effective fastening, the drilling point must fully penetrate all pieces of material being fastened before the first thread engages.  The last 2 digits identify the percentage of carbon for the alloy (in hundredths).
