ISO metric screw thread

The metric ISO thread is a globally standardized thread with metric dimensions and 60 ° flank angle. It replaces the older little different metric thread, especially but most threads with inch dimensions ( inch of the few threads used is the most famous, the Whitworth thread with 55 ° edge angle).

Standardization

The threads were in the ISO 1502 1996 "ISO general-purpose metric screw threads - Gauges and gauging " (DIN: Metric ISO thread of general application - Gauges and gauging ) and has been detailed in the DIN standards DIN 13 and DIN 14.

  • DIN 13-1 regular thread 1-68 mm threaded outer diameter
  • DIN 13 - 2 et seq clarifies the fine thread metric ISO threads
  • DIN 13 - 14ff clarify basic dimensions, tolerances, limit dimensions, gauges, etc. for various thread ( such as multi-start thread or bolts ) and nuts
  • DIN 14 1-4 threads below 1 mm nominal diameter

See list of standards DIN to an overview of the rows 13 and 14

Coarse thread of general application (DIN 13-1)

Notes:

  • To the sizes in the table header, see thread - parameter
  • In the table, the preferable values ​​of row 1 are given, values ​​such as M 7 or M 9 can be found in the series 2 and series 3
  • Dimensions (Dimensions ) in mm
  • Have stud bolts ( screws) with an Allen wrench size from M3 a equal to half the nominal diameter of the thread, for smaller nominal diameter shall M 1.6: 0.7 mm; M 2: 0.9 mm; M 2.5: 1.3 mm.
Thread angle British Standard Fine Hex key
241141
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