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