Butterfly nuts,fastener 1)Standard:DIN315(American Form) 2)Size:M3 to M12,1/4to1/2" 3)Cold heading 4)Mild steel,SUS304,brass Feature:1) Standard of butterfly nuts: DIN315 (American Form)2) Size: M3 to M12, 1/4 to 1/2"3) Cold heading4) Material: mild steel, SUS304, brassOuter packing: Carton or poly bag + Pallet our company supply butterfly nuts,wing nuts,fasteners. mm Thread size ...