Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SR-8521 found under Magnet Permanent by Permag Corp. The National Stock Number assigned to this part is 5999011765736, 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 SR-8521.