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根据 GB/T30 98.1 (等同采用 ISO898- 1 )和 GB/T30 98.2 (等同采用 ISO898- 2 )紧固件机械性能标准的规定 ,对所有性能等级的六角头螺栓和六角螺母以及内六角螺钉等 ,螺纹直径等于或大于 5 mm的紧固件产品上必须制出制造者 (或经销者 )的识别标志。制造者 (或经销者 )的识别标
According to GB/T30 98.1 (equivalent to ISO898-1) and GB/T30 98.2 (equivalent to ISO898-2) fastener mechanical performance standards, for all performance levels of hex head bolts and hex nuts and socket head screws, etc., Manufacturers (or distributors) must be identified on fasteners with a thread diameter of 5 mm or more. Manufacturer (or distributor) identification