UNF (black): 1/4"-28, 5/16"-24, 3/8"-24, 7/16"-20, 1/2"-20, 9/16"-18, 5/8"-18. UNC(silver): 1/4"-20, 5/16"-18, 3/8"-16, 7/16"-14, 1/2"-13, 9/16"-12, 5/8"-11;. The thread repair kit is made of the highest quality carbon steel and tempered at high temperatures for great strength and maximum durability.
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【48PCS Thread Chaser Set】Autory thread chaser kit has the most common sizes in UNC, UNF and metric. Cleans internal and external threads. The chart on
48PCS Thread Chaser Set Thread Repair Kit Includes 24 Rethreading Dies, 22 Rethreading Taps and 2 SAE Rethread Files, Thread Restorer Kit with Metric
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How to restorer old threads in metal