产品名称：12.9级高强度梅花头刀把螺丝材质：合金钢;表面处理：发黑；白色；***；古铜色；产品规格：M1.6*4M1.7*4M1.8*4M2.0*5M2.2*6M2.5*6M2.5*7M3.0*7M3.0*8M3.0*10M3.5*8M3.5*10M3.5*12M4.0*8M4.0*10M4.0*12M4.5*8M4.5*10M4.5*12M5.0*8M5.0*10M5*12M5*16M6*12M6*16M6*18；)