Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3801B522 found under Housing Mechanical Drive by Regal Beloit Corp Durst Div. The National Stock Number assigned to this part is 3040001046168, 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 3801B522.