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The limit dimensions for standard threads given in the table correspond to the - tolerance field 6g for bolt threads - tolerance field 6H for nut threads. The metric steel / metal threads specified in this catalog are based on these tolerance fields.
10.5 DIN 13 ISO Metric threads ISO Metric threads – DIN 13 (Thread limits for standard engagement lengths to UNI 5545-65) Nominal thread-Ø Gra-dient P Screw with tolerance of 6g Nut screw with tolerance of 6H Ø major d Ø pitch d 2 Ø minor d 1 Ø major D Ø pitch D Ø minor D max. min. max. min. max. min. min. max. min. max. min. max.
The limiting sizes for standard threads given in the table comply with - tolerance field 6g for bolt threads - tolerance field 6H for nut threads. The metric steel and metal threads specified in this catalogue are based on the tolerance fields given above.
ISO METRIC THREADS - DIN 13 (thread limits) P (mm) Screw with tolerance of 6g Nut screw with tolerance of 6H Ø major d Ø pitch d2 Ø minor d1 Ø major D Ø pitch D2 Ø minor D1 max. min. max. min. max. min. min. max. min. max. min. max. M3 0.5 2.980 2.874 2.655 2.580 2.367 2.273 3.000 2.675 2.775 2.459 2.599
Thread Standards: The most frequently used thread form is the 60° thread form found in the metric ISO thread and in the UN-series. However, there are other thread standards as well. These are either based on foreign standards or are used for special applications.
ISO Metric Coarse Thread DIN 13-1. Specifications of International Thread Standards. This thread is a globally standardized thread, it replaces older metric thread and most threads with inch dimensions. The label consists of the letter M followed by a number indicating the nominal diameter, the flank angle is 60 °. Advertising:
ISO 724 - ISO general-purpose metric screw threads - Basic dimensions (DIN 13), the standard in Europe, is recognizable by its cylindrical outer and inner diameter and its precise outer diameter in millimeters. Thread Dimensional Data. d = Basic Nominal Diameter.
