This is unique custom 302 stainless steel #4-24 X .900 socket sheet metal screw. It incorporates a 6-lobe socket drive and a partial thread with a AB type point. These special sheet metal screws are supplied at quantities of approximately 2,000 pieces per order and carry a lead time of 6-8 weeks. They are passivated in the final stage of the manufacturing process and are made in the USA.