Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 0020173 found under Parts Kit Reciprocating Pump by Griswold Pump Co. The National Stock Number assigned to this part is 4320012005633, 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 0020173.