... (ANSI, A193B7, A194 various high quality and precision screws, bolts, nuts and various non-standard special processing of fasteners. ... , structural steel fasteners, titanium alloy fasteners, chemical riveting bolt department cases. 2, stainless steel: SUS302, SUS304 ( ... 12, 13, cadmium gilded silver, etc. Small screws and zanies. Science and technology, productivity has catalyzed stupendous, to be able ...