DIY HUNTING TOOLS FISHING GEAR HARPOON ROD M8 TO M10 MALE AND FEMALE THREAD ADAPTER Aluminium alloy, a screw head aperture conversion. Male :M8, Female :M10. Male thread length: 15mm or 0.55", Female thread depth: 18mm or 0.7". Cylinder length: 21mm or 0.8", Cylinder diameter: 16mm or 0.63", Total length: 35mm or 1.38" . Packing quantity: 1 x Thread Adapter