C1022 DIN7504 galvanized self drilling screw EPDM washer 

Hex Washer Head Screws Eliminate the need for a pre-drilled hole which allows drilling and fastening to be done in the same motion. A/F=3/8 , 5/16Hex Washer Head Self Drilling Screws may look like standard screw, compared to the more unique thumb screw, but they include small carving piece at the end of the screw.Self drilling screw IFI, DIN 7504N pan head and Hex Washer Head Screws thickness plates depending on the screw diameter, Length from 19 mm up to 125 mm . Materials in 1022A and coating blue zinc plated, black zinc plated and white lacquered.Self Drilling Screw, Hexagon Colour Head Self Drilling Screw,Self Drilling Roofing Screw Finish:   ZINC, yellow, blue white zinc Material:   C1022 steel Measurement system:   Metric Head Style:   HEX Place of Origin:   handan city, China Brand Name:   JK Standard:   A/F,DIN self drilling screws   Size:   M5.5-M6.3 Length:  &…