Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SC-D-49643 found under Support Bell Crank by I T I Electronics Inc. The National Stock Number assigned to this part is 3040009730121, 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 SC-D-49643.