1/2x20 UNF - 2B Screw Plug Thread Gauge Go / NoGo

Specification Product: 1/2" x 20 UNF - 2B Screw Plug Thread Gauges Size: 1/2 x 20 tpi Unified National Fine Type: 1/2" UNF Double ended Go / No-Go BS1580, BS 919 Part 1 Class 2B Options: UKAS Calibration adds 7 days see options box Part Number ES-4014

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