N/a manufacturer / supplier in China, offering DIN7971 Standard Size Smooth Surface High Quality No Burr DIN 7971 Slotted Pan Head Self Tapping Screws, Pan Head Phillips Drive Tri-Lobular Thread Self-Tapping Machine Screws Zinc Plated, Screws Drilling End Screw Set Round Pan Head DIN7504n Self-Tapping Metal Screws for Sheet Metal Mounting and so on.