Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NAS1399MW4-3 found under Rivet Blind by Wesco Aircraft Hardware Corp. The National Stock Number assigned to this part is 5320009548500, and the Federal Supply Class is 5320 Rivets. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like NAS1399MW4-3.