Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 81G-0027M found under Seat Ring Rotameter by Ametek Inc. The National Stock Number assigned to this part is 4820011731285, 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 81G-0027M.