Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HAL-20-MIL-1000-80-PC05 found under O Ring by Flag Fire Equipment Ltd. The National Stock Number assigned to this part is 5331001668403, 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 HAL-20-MIL-1000-80-PC05.