Metric Fasteners - Socket Screw Hex Key and Nut Wrench Size

We highly recommend measuring metric screws by the screw thread diameter, but there are situations that come up where you might need to measure a screw size based upon limited information. Here we address two useful ways to find the screw size, or at least get you close enough that you can make an informed decision abo

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REF: Hex, Socket (Allen) and Torx Bolt and Screw Wrench Sizes

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