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7.5mm Torx High-Low Thread Window Door Frame Fixing Screw Concrete Frame Screws. ... All Sizes Zinc and Yellow Passivated Torx drive 7.5mm Hi Lo thread Concrete Screws. US $0.012-$0.034 Piece. 5000.0 Pieces ... Haiyan bafang concrete screw torx countersunk yellow zinc plated flat head window frame screws. US $0.01-$0.03 Piece.
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