Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4ST2-2 found under Oven Electrical Electronic Compo by Sensata Technologies Inc. The National Stock Number assigned to this part is 5955004489601, and the Federal Supply Class is 5955 Oscillators And Piezoelectric Crystals. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4ST2-2.