Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 68B520063-101 found under Cock Poppet Drain by Monogram Aerospace Fasteners Inc. The National Stock Number assigned to this part is 4820003949642, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 68B520063-101.