Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 38172 found under Packing Set Pump by Mcneil Ohio Corp. The National Stock Number assigned to this part is 2820003645462, and the Federal Supply Class is 2820 Steam Engines Reciprocating And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 38172.