Socket pin - in - hex Flat Head - Machine (Metric) Pinit $0.26 to $0.96 Quantity discounts available QuantityPrice SKU: 6. Flat Head - Machine (Metric) Select options Back $0.26 to $0.96 Screw Diameter : M3 M4 M5 M6 Screw Length : 8mm 10mm 12mm 16mm 20mm 25mm 30mm 40mm Screw Material : 18-8 Stainless Steel Quantity -+ Purchase