Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NDC49281-0752-21 found under Tuberculin Usp by Sanofi Pasteur Inc. The National Stock Number assigned to this part is 6505001178783, 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 NDC49281-0752-21.