Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number V5619B found under Washer Flat by Griswold Industries Co. The National Stock Number assigned to this part is 5310012881234, 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 V5619B.