Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number K6716-19 found under Washer Spring Tension by Knappco Corporation. The National Stock Number assigned to this part is 5310006041816, and the Federal Supply Class is 5310 Nuts And Washers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like K6716-19.