Ultrasonic Insert, Tapered, Brass, Internal Thread Size 4-40, Thread Type UNC, Length 9/64 In, Large End Dia 0.159 In, Tapered End Dia 0.153 In, Number of Vanes 1, For Use in Thermoplastics, Installation With Ultrasonic Horn or Heat Driver, Package Quantity 100. This item has been restricted from sale in the following state (s): []