Multi Application Harden Hex Bolt chu HRC 35 ~ 58 hmanga siam a ni
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Thil siam chhuah ber: 4.8 grade, 8.8 grade, 10.9 grade, 12.9 grade Hex Bolt, Countersunk Bolt, Button Head Bolt, Expansion Bolt matched nut leh washer nei. GB, DIN, ANSI, BC, JIS leh ISO ang chi standard hrang hranga bungrua kan siam thei a, USA, Turkey, Brasil, Japan, Argentina etc. atang pawhin hming tha tak kan nei tawh bawk