Threads and Fasteners - Cabarrus County Schools

UTS consists of Unified Coarse (UNC), Unified Fine (UNF), Unified Extra Fine (UNEF) and Unified Special (UNS). The International Organization for Standardization's ISO metric screw thread preferred series, based on round millimeter dimensions, is the standard that has been adopted world-wide and has displaced all former standards, including UTS. ................
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