Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 13956 found under Cup Pressure Line by Honeywell Aerospace. The National Stock Number assigned to this part is 1660001670599, and the Federal Supply Class is 1660 Aircraft Air Conditioning Heating And Pressurizing Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 13956.