Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number K678756 57 found under Hose Assembly Nonme by Kaman Aerospace Corporation. The National Stock Number assigned to this part is 4720015093647, and the Federal Supply Class is 4720 Hose And Flexible Tubing. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like K678756 57.