ISO general purpose metric screw threads - Part 51: External screw threads for transition fits (former: screw threads for interference fit) - tolerances, limit deviations, limits of sizes
|Publication Date:||1 October 2013|
|ICS Code (Metric screw threads):||21.040.10|
This standard specifies the tolerance classes for external threads to be paired with internal threads of tolerance class "fine" (4H and 4H5H) as in DIN ISO 965-1. This pairing of threads aims to achieve an "interference fit".
NOTE Depending on the actual size of external and internal threads "interference fit" is often not achieved. If "interference fit" is essential, application of DIN 8141-1 "ISO-metric screw threads; coarse pitch threads and fine pitch threads for interference fits in aluminium cast alloys; nominal diameter from 5 mm to 16 mm; nominal sizes, tolerances and limits of sizes" is recommended.