Indented hex washer head
Size : M4.8, M5.5, M6.3/5.5, M7.0/5.5
Length : 32~400MM
Surface : Zinc plated, ruspert
EPDM washer : steel, stainless steel, aluminum
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PATENTED POINT
PATENTED WHIRLWIND POINT
with patented point no.5, 6 till no. 10 which can drill through 25mm thick plate
DETAIL