British Standards Institution

Source:: ISO
Committee:: FME/9 - Fasteners
Categories:: Nuts
Comment period start date:: 06/06/2024
Comment period end date:: 30/07/2024
Number of comments:: 0

Comment by:

30th Jul

Scope

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 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.

Read draft and comment

Comment on proposal

Required form fields are indicated by an asterisk (*) character.

How important do you think standardization is in this area? *

Do you agree that a standard on this subject is feasible?: *

Please give reasons for your selections above: *

Would you or your organization use the standard? *

Would you or your organization be prepared to participate in the development of the standard or to comment on the draft when it is available? *

Are you aware of any regulation, existing standards and other good practice information in this area in the UK (e.g. Industry codes of practice; company specifications, international or European Standards)? *

Would the development of a standard(s) in this area have a particular impact/relevance to SME, consumer, environmental or societal interests? *

Are you aware of any other organizations to which this proposal may be relevant? If so please provide details below. *

Additional comments on the scope or proposal:

Although BSI will not usually enter into correspondence regarding individual comments or suggestions we may wish to contact you to seek further clarification. Please indicate whether this will be acceptable: *

Discard

Please email further comments to: debbie.stead@bsigroup.com

Standard timeline

1. Proposal (Complete)

Proposal start date:

2. Draft (Complete)

Draft start date:

04/04/2024

3. Public Comments

Public Comments start date:

06/06/2024

Public Comments end date:

30/07/2024

Learn more about the standards development process

Standards Development

BS EN ISO 7720 ISO 7720 Fasteners. Prevailing torque hexagon nuts. High nuts (all metal) with slot(s)

Scope

Comment on proposal

Discard changes?

Submit comment

Submit comment

Follow standard

Unfollow standard

Error