10PCS UNC US 1-4/20 304 A2 Stainless Steel DIN933 External Hex Screw OuterHexagon Head BoltThin teeth coarse teeth outer hexagon
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10PCS UNC US 1-4/20 304 A2 Stainless Steel DIN933 External Hex Screw OuterHexagon Head BoltThin teeth coarse teeth outer hexagon