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Black oxide Allen head cap screws---have a bunch with light rust...how to clean? | The Garage Journal
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OBPSFY Broken Water Pipe Screw Extractor Kit | Dual-use Water Pipe Screw Removal Tool for 1/2 3/4 Inch Pipes Valve Faucet | with BSP Pipe Tap for clean/re-thread damaged/Jam Pipe threads -
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