Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 21X1413X1 found under Gearshaft Helical by David Brown Hydraulics Inc. The National Stock Number assigned to this part is 3040011720503, 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 21X1413X1.