Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5003 6.00IN INTERNAL ONLY found under Repair Kit Valve by Pcc Valves And Controls. The National Stock Number assigned to this part is 4820014633817, 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 5003 6.00IN INTERNAL ONLY.