Abstract

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 (total) height h greater than in ISO 7042, in order 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 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.

Begin

2023-04-20

WI

00185437

Planned document number

DIN EN ISO 7720

Project number

06702413

Responsible national committee

NA 067-00-03 AA - Fasteners with metric internal thread  

Responsible european committee

CEN/TC 185 - Fasteners  

Responsible international committee

ISO/TC 2/SC 12 - Fasteners with metric internal thread  

draft standard

Fasteners - Prevailing torque hexagon nuts - High nuts (all metal) with slot(s) (ISO/DIS 7720:2024); German and English version prEN ISO 7720:2024
2024-07
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