1 3/4-5-6-8-12-16-18-20 UNC / UN LH 2B Thread plain end plug gauge US system measuring screw thread plug gauge GO NOGO gage

1 3/4-5-6-8-12-16-18-20 UNC / UN LH 2B Thread plain end plug gauge US system measuring screw thread plug gauge GO NOGO gage

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