Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number JJ42721 found under Rivet Blind by Mtu Detroit Diesel Australia Pty Lt. The National Stock Number assigned to this part is 5320004246922, 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 JJ42721.