Unified national thread rate chart. Basic effective dia (inches), Basic minor dia of ext. The Unified Thread Standard (UTS) defines a standard thread form and series—along with.
UTS threads do not usually use the pitch parameter; instead a parameter known as. This number pair is optionally followed by the letters UNC, UNF or UNEF if the diameter-pitch combination is from the coarse, fine or extra . Basic Dimensions for Unified Screw Threa UNC Coarse-Threa UNF Fine-Threa UNEF Extra-Fine-Thread. Nominal Diameter (in), Threads per inch, Major Diameter (in), Major Diameter (mm), Tapping Drill Size (mm), Pitch (mm) .
Diameter, Diameter, Diameter, Drill Size, mm. UNC and UNF threads are the choices for the customary Unified screws and nuts. External Thread Dimensions for Unified UNF Screw Threads. Nominal Thread Size, Covered Range.
UNF to ¼-UNS, Nominal thread sizes from 0-UNF to ¼-UNS. Thread dimensions and pitch for metric and imperial fasteners - Metric, Metric Fine, BSW, BSF, UNC, UNF and BA.
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