Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5Z5717707 ITEM 272 found under Ring Retaining by Siemens Industry Inc. The National Stock Number assigned to this part is 5325013463540, and the Federal Supply Class is 5325 Fastening Devices. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 5Z5717707 ITEM 272.