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M3 M4 M5 M6 M8 M10 M12 Hex Coupling Nuts 304 Stainless Steel Rod Coupling Extension Nut Connection Threaded Bar Stud Long Nuts
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2pcs M8 x 50mm Long Rod Nut Hex Coupling Nuts, 304 Stainless Steel Bolt Extender Female Thread Straight Fitting, Hex Rod Threaded Bar Nut: Amazon.com: Industrial & Scientific
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Hillman #10 x 24 Stainless Steel Stainless Steel Regular Coupling Nut in the Coupling Nuts department at Lowes.com
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