Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 09 9124 56 found under Grounding Set Trans by L 3 Communications Essco Inc. The National Stock Number assigned to this part is 5975015924834, and the Federal Supply Class is 5975 Electrical Hardware And Supplies. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 09 9124 56.