Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 37590-219 found under Cap Protective Dust And Moisture Seal by Marconi Electronics Inc. The National Stock Number assigned to this part is 5340013475977, 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 37590-219.