Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number K19253-0004H found under Meter Time Totalizing by Ai Tek Instruments Llc. The National Stock Number assigned to this part is 6645001760223, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like K19253-0004H.