Hex Nut

GB hex nut is widely used, mainly in the field of machinery and equipment, construction, automobile, railway and other industries. Nut mechanical property has grade 4, grade 6, grade 8 and grade 10. GB hex nut covers the dimensional requirments of metric series hex nut. The common standard of GB hex nut is GB6170/6175. It includes normal hex nut and heavy hex nut. The size from M3-M64 diameter.