Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MS500046-1 found under Cock Plug by Eca Etablissement. The National Stock Number assigned to this part is 4820007533853, 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 MS500046-1.