Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 949-13 found under Glass Indicator Sig by Bureau Of Mines Helium Operations. The National Stock Number assigned to this part is 9340009661453, and the Federal Supply Class is 9340 Glass Fabricated Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 949-13.