Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 52SS5640 found under Grommet Nonmetallic by Bae Systems Operations Ltd. The National Stock Number assigned to this part is 5325012055157, 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 52SS5640.