Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1220K1-35-37 found under Diffuser Burner by Puget Sound Commerce Centerinc. The National Stock Number assigned to this part is 4530003948463, 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 1220K1-35-37.