... wing nut 1.Dia.17mm,ductile iron 2.Weight:0.50kg,pitch:6.35or10mm 3.Round base: ... Dia.90mm 4.Zinic. 15/17mm Cast iron formwork wing nutVery Good Cast Manufacturing ability for All types ... wing nuts, jack nuts, prop nuts.1. Material: Ductile iron .Two wing nuts.2. Sizes: Dia 17mm, plate: Dia. 90mm3. ... requirements, please feel feel to contact us. 15/17mm Cast iron formwork wing nut