卵头自攻螺钉
Cross Oval head high-low thread zinc plated sharp point
Coating: zinc plated , black phosphate
Diameter: #6, #7, #8, #10 (M3,5 M3,9 M4,2 M4,8)
Length: 5/8”” to 4” (16mm to 102mm)
Material: 1022A medium carbon steel, harden
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