Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D12709 found under Collar Shaft by Blowers Llc. The National Stock Number assigned to this part is 3040001090439, 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 D12709.