GB standards are the Chinese national standards issued by the Standardization Administration of China (SAC), the Chinese National Committee of the ISO and IEC. Mandatory standards are prefixed “GB”. Recommended standards are prefixed “GB/T” (tuījiàn). A standard number follows “GB” or “GB/T”. GB standards are the basis for the product testing which products must undergo during the China Compulsory Certificate (CCC) certification. If there is no corresponding GB Standard, CCC is not required.

GB national standard is one among the many standards of China. In addition, there are industry standard, professional standard and departmental standard. National standard can be classified into GB (mandatory standard), GB/T (recommended standards) and GBn (national internal standard) and so on. The standards often see like GB30, GB5783 and other standards are mandatory standards.

The wide range of GB standard Fasteners includes,