Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number T4B4AQ found under Shaft Shouldered by Pentair Pump Group Inc. The National Stock Number assigned to this part is 3040006003299, 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 T4B4AQ.