Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 340-3557607-7 found under Pin Rear Cargo Door by Tracor Flight Systems Inc. The National Stock Number assigned to this part is 5342006931275, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 340-3557607-7.