Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number F20-09573PC16 found under Washer Flat by Tyco Fire Products Lp. The National Stock Number assigned to this part is 5310009012451, 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 F20-09573PC16.