Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PL79221 ITEM 4 found under Shaft Straight by Ausco Products Inc. The National Stock Number assigned to this part is 3040015181988, 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 PL79221 ITEM 4.