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SPI - Threaded Ring Gage: M20 x 2.50 Thread, Metric, Class 6G, Go - 75890525 - MSC Industrial Supply
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SPI - Threaded Ring Gage: M20 x 2.50 Thread, Metric, Class 6G, No Go - 75890533 - MSC Industrial Supply
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M20 X 1.5 SPECIAL METRIC THREAD RING GAGE 20.0 GO ONLY P.D.= 18.961MM INSPECTION - M & J Tooling LLC
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