Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A4660 found under Spider And Shaft As by Pierce Co Inc The. The National Stock Number assigned to this part is 2990000365518, and the Federal Supply Class is 2990 Miscellaneous Engine Accessories Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A4660.