螺丝头类型
平底锅, 大圆扁头, 平板型, 椭圆形, 圆形, 六角, 芝士
Product name
all types special screws
Grade
8.8,10.9,12.9,SAE J429 GR.5/GR.8
Length
all length available
material
alloy steel, carbon steel 35#,stainless steel, brass,copper...
Surface treatment
Black, Zinc Cr+3, Yellow Zinc Cr+6,H.D.G., Dacromet, etc.