ISO 7720:2025
Current
The latest, up-to-date edition.
Fasteners — Prevailing torque hexagon nuts — High nuts (all metal) with slot(s)
Hardcopy , PDF
English, French
10-06-2025
This document specifies the characteristics of prevailing torque (all metal) hexagon high nuts with slot(s), in steel and stainless steel, with metric coarse pitch thread M5 to M39, and with product grades A and B.
NOTE These nuts are designed with mmin as specified ISO 4032 and with an overall height h greater than in ISO7042, in order to accommodate the prevailing torque feature with slot(s); this height h contributes to the nut resistance due to the number of engaged threads. hmin values have been calculated as a function of hmax together with a ratio hmax/D that progresses regularly with increasing diameter; therefore, the tolerance (hmax–hmin) does not follow the ISO code system for tolerances (IT system).
If in certain cases other specifications are requested, property classes and stainless steel grades can be selected from ISO 898-2 or ISO 3506-2.
| DocumentType |
Standard
|
| Pages |
6
|
| PublisherName |
International Organization for Standardization
|
| Status |
Current
|
| Supersedes |
| Standards | Relationship |
| SS-EN ISO 7720:2025 | Identical |
| ÖNORM EN ISO 7720:2025 09 15 | Identical |
| DS/EN ISO 7720:2025 | Identical |
| DS/ISO 7720:2025 | Identical |
| NS-EN ISO 7720:2025 | Identical |
| NS-EN ISO 7720:2025 | Identical |
| PN-EN ISO 7720:2025-11 | Identical |
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