Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 377 6321 017 found under Stuffing Box Cylind by Parker Hannifin Ltd. The National Stock Number assigned to this part is 3040013243759, and the Federal Supply Class is 3040 Miscellaneous Power Transmission Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 377 6321 017.