Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SY3840 found under Filter Drier Refrigerant by Raytheon Technical Services Company. The National Stock Number assigned to this part is 4130006838696, and the Federal Supply Class is 4130 Refrigeration And Air Conditioning Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SY3840.