Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 0003-4540-960 found under Brush Test Tube by Westfalia Separator Mineraloil. The National Stock Number assigned to this part is 7920121599684, 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 0003-4540-960.