Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number J4D643 found under Lining Friction by Fairbanks Morse Llc. The National Stock Number assigned to this part is 3040005281998, 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 J4D643.