... ISO9001:2008, OEM service 4) low price,long operating life Standard ACME,JIS,DIN,BSW ... machinery, building industry, electrical and electronic products, industrial machinery and equipments, transportation, and etc. Main equipment CNC ... grinder, thread rolling machine, tapping /drilling machine and etc Surface treatment Polishing, zinc plating, nickel ... free to contact us. metal and plastic screw nut