Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 132X55-66 found under Bonnet And Stem Ass by Kerotest Manufacturing Corp. The National Stock Number assigned to this part is 4820004470010, 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 132X55-66.