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Old 03-16-2019, 02:15 PM
terry lingle's Avatar
terry lingle terry lingle is offline
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Join Date: Aug 2004
Location: Birch Island, BC, Canada
Posts: 5,280
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Most metric hardware looks so different to me that I have no problem identifying it on sight.
If I am not sure I look at the grade mark. You will never see an inch bolt marked 10.2 or a metric bolt with SAE lines on it.
Metric Nuts just look wrong when you are used to SAE sizing.
Wait until you find a witworth nut on something and try to find a socket for it.

How many here have an OA or OB socket or know where they are used?
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