Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A3030172-2 found under Shaft Shouldered by A R E Mfg Co Inc. The National Stock Number assigned to this part is 3040011501734, 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 A3030172-2.