washer plate 1) manufacture all kinds of wing nut 2) nodular cast iron 3) suitable for 15/17mm, 21/23mm 4) EN74 & BS 1139 washer plate1) all kinds of wing nut2) nodular cast iron3) suitable for 15/17mm, 21/23mm4) EN74 & BS 11395) manufacturerbase plate size: dia. 70mm, 80mm, 90mm, 100mm, 110mmsize and weight can be produced according to customer's requirement. washer plate