Ɗaya daga cikin masana'antun kasar Sin na Hexagon Head Flange Face Bolts, yana ba da kyakkyawan inganci a farashi mai gasa, shine DONGSHAO. Wannan nau'in bola ne na gama-gari wanda ake amfani da shi sosai a cikin gine-ginen masana'antu da na farar hula iri-iri. Yana fasalta ƙayyadaddun zaren M8 × 1-M16 × 1.5, zaren mai kyau, ƙimar aiki na 8.89.810.912.9 da A2-70, da ƙimar samfurin A.
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