Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A61-4-1P13 found under Block by Actuant Corporation. The National Stock Number assigned to this part is 3040002316631, 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 A61-4-1P13.