Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HS4267S3-200 found under Lockspring Turnlock Fastener by Boeing Company The. The National Stock Number assigned to this part is 5325004890866, 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 HS4267S3-200.