Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number YHD0678Z4 found under Knob by Hypertronics Corporation. The National Stock Number assigned to this part is 5355015086690, and the Federal Supply Class is 5355 Knobs And Pointers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like YHD0678Z4.