Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A53 1576 found under Shaft Shouldered by Barber Greene Co. The National Stock Number assigned to this part is 3040012627581, 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 A53 1576.