埋头螺钉,埋头螺丝;
Side view of raised countersunk slotted screw with adjustable thread length.
螺纹长度可调整的半埋头一字槽螺钉的侧面图.
Slotted oval countersunk head wood screw
一字槽椭圆沉头木螺丝
Cross recessed countersunk head screw and countersunk serrated external toothed lock washer assemblies
GB/T9074.9-1988十字槽沉头螺钉和锥形锁紧垫圈组合件
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