Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MS20426B3 18 found under Rivet Solid by B E Aerospace Inc. The National Stock Number assigned to this part is 5320015050066, 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 MS20426B3 18.