Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 60138818-001 found under Clock Real Time by Bull Hn Information Systems Inc. The National Stock Number assigned to this part is 5999010864744, 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 60138818-001.