Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number C3-019-99-0003 found under Tester Acetylene by Cryo Source Llc. The National Stock Number assigned to this part is 4940012744587, 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 C3-019-99-0003.