OMPHOBBY M4 Countersunk head hexagon socket screw M2.5x6mm OSHM4113 Sale! from 357 /per Qty. Add to Cart This is a replacement Countersunk head hexagon socket screw M2.5x6mm for the OMPHOBBY M4 Helicopters Contents Countersunk head hexagon socket screw M2.5x6mm Qty available:1 SKU:OSHM4113