Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 05-4170-01 found under Drain Automatic Snap Trap by Phelon R E Co Inc. The National Stock Number assigned to this part is 4440011788856, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 05-4170-01.