Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4B6167 found under Collar Shaft by Caterpillar Inc. The National Stock Number assigned to this part is 3040001499014, 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 4B6167.