Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 177 285 0200 found under Ring Guide by Nahi Llc. The National Stock Number assigned to this part is 4820016428355, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 177 285 0200.