Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PM - 1 6 found under Pump Rotary by Sethco Div Of Met Pro Corp. The National Stock Number assigned to this part is 4320012411201, and the Federal Supply Class is 4320 Power And Hand Pumps. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like PM - 1 6.