uxcell M4 x 0.5mm HSS Straight 3-Flute Machine Thread Screw Metric Connector Tap 10pcs Main Color: Gray; Weight: 43g; Total Length: 56mm/2.2" Product Name: Machine Connector Tap; Shank Diameter: 4mm/ 0.2"; Flute Diameter: 4mm/ 0.2"(M4) Flute Number: 3; Material: HSS; Package Content: 10pcs x Machine Connectors Tap Thread Length: 15mm/ 0.6"; Square Head Size: 3.4 x 3.1mm/ 0.13" x 0.12" (L*W) Pitch: 0.5mm; Battery Included: No