Multi hman dan Harden hex bolt chu HRC 35 ~ 58 nen a inzawm a.
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Main products: 4.8 grade, 8.8 grade, 10.9 grade, 12.9 grade hex bolt, countersunk bolt, button head bolt, expansion bolt te chu nut leh washer matched te nen. GB, DIN, ANSI, BC, JIS leh ISO ang chi standard hrang hrang nei thil kan siam thei a, USA, Turkey, Brasil, Japan, Argentina etc. atang pawhin hmingthanna tha tak kan nei thei a,