Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MIL-B-15319 TY1 CL2 SZ1 found under Brush Platers Hand by General Services Administration Inc. The National Stock Number assigned to this part is 7920002447431, 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 MIL-B-15319 TY1 CL2 SZ1.