Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 451 204 0 0000 found under Plug Machine Thread by Hydraulics International Inc. The National Stock Number assigned to this part is 5365012755608, and the Federal Supply Class is 5365 Bushings Rings Shims And Spacers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 451 204 0 0000.