Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 377948-1 found under Duct Assembly Bleed by Senior Operations Llc. The National Stock Number assigned to this part is 1660008635250, 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 377948-1.