Some years ago our customer approached us with the task of creating this self piercing screw for a specialized assembly application. It has since become a consistent item we carry to ensure adequate supply for their need at all times. The part is a modified truss head self tapping type A screw, with a phillips drive. Measuring 9-9 X 1-5/8 in length this part is a special screw manufactured to print using 18-8 stainless steel, followed by a passivation process.