An easy to read chart of screw sizes and thread counts
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Small screws in old ~1970's lenses? - Classic Manual Film Cameras - Photo.net
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Fastener Basics
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Chart comparing standard screw / nut / hole sizes | Screws and bolts, Metal working tools, Drill bit sizes
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DIN 931 Stainless Steel Hex Head Cap Screw Dimensions | Metric bolt sizes, Engineering tools, Drill bit sizes
Thread Chart (Metric) | Major and Minor Diameters
