Flange bolts have a flange on the bottom of the head that distributes the load like a washer. Thread Diameter 6mm, Thread Size 1.0mm (M6), Screw Length 20mm, 25mm,uded: M6 x 20mm (5 PCS), 25mm (5 PCS), 30mm (5 PCS), 35mm (5 PCS), 40mm (5 PCS), and all come in a quality plastic storage box.
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