Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5991CNTL 002 found under Valve Butterfly by Honeywell Aerospace. The National Stock Number assigned to this part is 4810999042071, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 5991CNTL 002.