... , YZP, H.D.G.Fastener products domain:Bolt series: Hexagon head screws: DIN931, DIN933, DIN601, ISO4014, ISO4017, ISO4016), Hexagon socket cap ... , DIN7983, DIN7984, DIN7985, DIN7991, ISO7380), Wood screws, (DIN7995, DIN7996, DIN571), Drywall screws, (DIN18182), Washer series: Flat washer(DIN125, DIN6921, SO7089), Spring Washer, (DIN127 ...