Features: Material: SUS303 stainless steel Female Thread Size: M3 (diameter) x 0.5 (pitch) Length: 6mm Male Thread Size: Hole: M5 (diameter) x 0.5 (pitch) drilling Diameter: 4.5~4.6mm (Plastic); 4.6~4.7mm (Aluminum Alloy); 4.7~4.8 mm (cast iron) min. Drilling depth: 8 mm Quantity: 20 pieces Weight: approx. 9 g Package content: 20 x thread inserts