Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5745450-0020 found under Collar Shaft by Kollsman Inc. The National Stock Number assigned to this part is 3040013312122, 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 5745450-0020.