OMPHOBBY M4 Helicopter Socket cap screw M2.5x5mm OSHM4078 Sale! from 149 /per Qty. Add to Cart This is a replacement socket cap screw M2.5x5mm for the OMPHOBBY M4 Helicopters Contents socket cap screw M2.5x5mm-10 Qty available:1 SKU:OSHM4078