Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NDC00173-0856-95 found under Sulfamethoxazole An by Burroughs Wellcome Co. The National Stock Number assigned to this part is 6505011693658, 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 NDC00173-0856-95.