Specification: Description: Features: 8mm flange diameter, 4mm thickness hex head, 410 stainless steel self drilling screws M4.2x19mm. Self-tapping and self-drilling to make pre-drilling unnecessary. Teks self-tapping screws provide secure fastening with strong holding power without the need to pre-drill. Engineered drill-point and flute remove material efficiently and properly size the hole for threads. .
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