50pcs~5pcs GB834 Stainless Steel Knurled Head step Thumb Screw M2 M2.5 M3 M4 M5 M6 Metric Tall Head Manual Adjustment Screws

50pcs~5pcs GB834 Stainless Steel Knurled Head step Thumb Screw M2 M2.5 M3 M4 M5 M6 Metric Tall Head Manual Adjustment Screws

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