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M3/M4M5/M6/M8/M10/M12/M14/M16stainless Steel 304 Converter Reducing Bolt Camera Adapter Conversion Screw Double Heads Screw1235-M4-M5,8mm,Stainless Steel 304 : Amazon.co.uk: DIY & Tools
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Amazon.com: Daoke Screws, 304 Stainless Steel reducing Screw, M3-M16, Large and Small Head Bolts, Conversion Screw, reducing Screw-M4 6-M5 6 (Color : M3*6-M5*6 [3pcs]) : Industrial & Scientific
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terminology - What do the numbers in screw sizes M3, M4 etc. mean? - Home Improvement Stack Exchange
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