M8 (8mm) x 1.25mm pitch Metric Coarse Countersunk Head Socket Screws Stainless A2-70 G304 sit flush with the surface of the material rather than protruding above it like other types of screws. Countersunk heads are commonly used in fixtures where the screw must be partially or fully concealed. A high tensile precision fastener that can be used to fasten components together by means of through holes and securing with a nut at the other end or they are screwed into a tapped hole with the matching didgeridoo leg thread.