Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 40-0000129 found under Plug Expansion by Hercules Engine Co Inc. The National Stock Number assigned to this part is 5340014155211, 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 40-0000129.