Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 090-03-A-1 found under by Matheson Lloyd J Inc. The National Stock Number assigned to this part is 5340013574837, 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 090-03-A-1.