Metric Thread Pitch dimensions - U-Bolts-R-Us / Graphskill Ltd Blog
M3 Phillips Flat Head Machine screws, Stainless Steel DIN 965 Coarse
Humbucker mount screws and springs. M3 thread, 2 pairs. – Warman Guitars
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M3 M4 M5 M6 Left Hand Thread Allen Hex Socket Head Cap Screws Bolts Select Size | eBay
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ISO metric screw thread - Wikipedia
File:M3 screw and 6-32 UTS screw with ruler thread pitch.png - Wikimedia Commons
TR knowledge base | Thread geometry - metric coarse