Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 21187-00319 found under Eyelet Turnlock Fastener by Selex Es Ltd. The National Stock Number assigned to this part is 5325006384301, 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 21187-00319.