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Progress is fine, but it's gone on for too long.: Vanished Tool Makers: The Bay State Tap & Die Company, Mansfield, Massachusetts
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Greenfield Tap and Die Corporation : Gages, Taps, Dies , Threading Machines, Reamers. Catalog 37 [1916: first combined catalog]: Good Card covers (1916) | The Odd Book (ABAC, ILAB)
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Irwin Industrial Tools 23614 Machine Screw with Fractional Tap and Solid Round Die Set, 39-Piece - - Amazon.com
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31PCS HSS M1.0 to M2.5 Precision Micro Size Thread Tap and Die Set with Holder Wrench Kit - China Screw Tap and Machine Screw Tap
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