Choose your country or region


South Africa

EN

Canada

FR EN

México

ES EN

United States

EN

Australia

EN

China / 中国

ZH EN

India

EN

South Korea / 대한민국

KO EN

Malaysia

EN

Singapore

EN

Taiwan, China / 中国台湾

ZH EN

Thailand

TH EN

Vietnam

VI EN

Česká Republika

CS EN

Denmark

DA EN

Deutschland

DE EN

España

ES EN

France

FR EN

Ireland

EN

Österreich

DE EN

Polska

PL EN

Schweiz / Suisse / Svizzera

DE FR IT EN

Sweden

SV EN

Netherlands

NL EN

Norway

EN

Global

EN

Please start typing to get suggestions.

Website results

Suggestions are being loaded.


Product suggestions

Suggestions are being loaded.


Metric ISO threads

The thread dimensions and profile accuracy are crucial for determining:

  • Whether a coating can still be applied to the screw thread
  • Whether the parts to be joined can be screwed together on assembly without difficulty or the need for reworking
  • Whether the thread can transmit the forces for which the components were dimensioned.

Tolerances are very small in screw manufacturing. Terms and fitting systems are difficult to understand. To assist, the following illustrations explain dimensions and tolerances.

 

Content:
Basic concept and nominal dimensions
Clearance fit on metric ISO threads
Tolerance fields for commercial screws and nuts
Limits for metric (standard) coarse threads
Selection series for coarse threads
Limits for metric fine threads
Selection series for fine threads
Permissible tolerances for plastic fasteners

 

Download