Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 42593-039 found under Cap Protective Dust by Enertec America Inc. The National Stock Number assigned to this part is 5340013976528, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 42593-039.