Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1R5444-19 found under Valve Restrictor Ch by Saf Industries Llc. The National Stock Number assigned to this part is 4820007829623, 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 1R5444-19.