Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number P1664 ITEM 11 found under Ring Spacer by N J C T Corp. The National Stock Number assigned to this part is 5365011648159, 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 P1664 ITEM 11.