Subscribe to updates

ISO 2903:1993

ISO metric trapezoidal screw threads -- Tolerances

This standard has been reviewed and then confirmed in 2014 
More information

ISO standards are reviewed every five years


Media and price

Format Price Language

All our PDF formats are watermarked.
A watermark is additional information that has been
added to a document to identify the rightful licensee.

More information under shopping FAQs

CHF 38,00 Add to basket
Paper CHF 38,00 Add to basket

Note: This standard is also included in the online collection: Fasteners and screw threads.



Specifies a tolerance system for threads according to ISO 2902; the system does not apply to threads with special requirements on axial displacement (e.g. lead screws); gives the structure of the system and tabulates pitches from 1.5 up to and including 44, comprises basic major diameters over 5.6 mm up to and including 355 mm; includes recommended tolerance classes for bolt and nut threads.


  • Edition: 2 (Monolingual) ICS: 21.040.10
    Status: Published Stage: 90.93 (2014-04-11)
    TC/SC: ISO/TC 1 Number of Pages: 10
  • Revises: ISO 2903:1977

  • No corrigenda or amendments available

Preview and follow ISO 2903:1993 on our Online Browsing Platform


Contact customer services

Send your enquiry by email
or call us on +41 22 749 08 88
09:00 – 12:30, 14:00 – 17:00 (UTC+1).

Related standards

Standards in the same category (21.040.10)
Standards from the same committee