China Torx Pan Head Thread Forming Screw Philips Self-Forming Screw Zinc Plated DIN7500c DIN7500d DIN7500PE DIN7500m - China Screw, Hex Flange Head Self-Tapping Screw
DIN 7500 - Trilobular Thread Rolling Screws | PDF | Screw | Metalworking
DIN 7500 (D) - 1984Hexagon head thread rolling screws, grade A and B