Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4015-141 found under Heat Sink Insulator by Bc Systems Inc. The National Stock Number assigned to this part is 5999011370049, and the Federal Supply Class is 5999 Miscellaneous Electrical And Electronic Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4015-141.