Type A point has a conical tip and spaced threads that are suitable for forming threads in holes drilled in thin metals between 0.015" and 0.050" thick and resin impregnated plywood
Steel is often used in applications where strength is the primary consideration, and the black oxide finish offers mild corrosion resistance and lubricity
Pan head has a flat top and short vertical sides with a rounded top edge
Square drive resists slippage better than a Phillips or slotted drive