Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 11 129 found under Seat Helical Compression Spring by Delphi Automotive Systems Llc. The National Stock Number assigned to this part is 5340013342780, 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 11 129.