Technical supply conditions for threaded steel fasteners: Part 6 Mechanical properties of fasteners made of carbon steel and alloy steel — Nuts with specified property classes (fifth revision)
Document Title [Hindi] :
इस्पात के चूड़ीदार बंधकों के लिए तकनीकी पूर्ति शर्ते भाग 6 कार्बन इस्पात एवं मिश्र धातु इस्पात के बने बंधकों के यांत्रिक गुणधर्म — निर्दिष्ट गुणधर्म वर्गों की ढिबरियाँ (पाँचवा पुनरीक्षण)
Document Type :
Revision
Language :
English
Priority :
3
ICS Code :
21.060.20
Date of Project Approval :
27-02-2023
Standards to be Revised :
Sl.No.
Is No & Year
1
IS 1367 : Part 6: 2025
Standards to be Superseded :
Sl.No.
Is No & Year
1
IS 1367 : Part 6: 2025
Classification Details
Group :
Building Materials including Paints
Sub Group :
Fasteners and hardware
Sub Sub Group :
Fastners
Aspects :
Others
Risk :
Low
Certification :
Not Certifiable
Short Commom Man's Title :
ITCHS Code :
Ministry :
Ministry of Commerce and Industry - Department for Promotion of Industry and Internal Trade (DPIIT)
Sustainable development Goals :
Degree of Equivalence :
Identical under dual numbering
Identical/Equivalent Standards :
ISO 898-2 : 2022
Organization Type:
ISO
Division Council Chairperson Approval Details
Request Date:
12-09-2024
Status of Chairperson Approval:
Division Council Chairperson approval uploaded by member secretary (Click to View)
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2
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3
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4
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5
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7
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8
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Sl. No.
Document No
Document Title
1
PGD/37 /
22772
Fasteners — Terminology: Part 4 Control Inspection, Delivery, Acceptance and Quality
::Cross Referenced International Standard(s) & Standard(s) Of National SDO(s) ::
Sl. No.
Prefix
Number
Part
Section
Year
1
ISO
16228
-
-
-
Sl.No.
Synosis Points
1
This document specifies the mechanical and physical properties of nuts made of non-alloy steel or alloy
steel, when tested at the ambient temperature range of 10 °C to 35 °C.
2
The major changes in this revision are as follows:
a) Property class 9 has been deleted completely, and nuts with fine pitch thread and property class 5 have been deleted (see Introduction);
b) Nuts with fine pitch thread in style 2 and property class 12 have been added for diameters 18 mm to 39 mm (see Tables 4, 6 and 10);
c) Styles have been more precisely specified for standard hexagon nuts according to their minimum height, and styles have been specified for other nuts according to their minimum design thread height (see 5.1);
d) Additional statements for thin nuts and jam nuts have been added (see 6);
e) Additional statements for hot dip galvanized nuts have been added by referencing ISO 10684;
3
f) In relation to material, heat treatment and steel microstructure (see 7):
1) The minimum carbon content has been added (see Tables 3 and 4),
2) The minimum manganese content has been specified to 0.25 percent for all Non-Quenched and Tempered nuts (NQT) and has been raised to 0.45 percent for all Quenched and Tempered nuts (QT) (see Tables 3 and 4),
3) The table footnote for free cutting steel has been reworked (see Tables 3 and 4),
4) The minimum tempering temperature has been added for QT nuts (see Tables 3 and 4), and a reference retempering test has been added (see 10.4),
5) For nuts that may optionally be quenched and tempered at the manufacturer’s discretion,
6) detailed specifications have been added (see 7.2),
7) Specifications for steel microstructure have been added for NQT and QT nuts (see 7.4.1, 7.4.2 and 10.3);
4
g) In relation to proof load:
1) The proof load values for nuts with coarse pitch thread and property classes 6 and 8 have been raised for sizes M27 to M39 (see Introduction, Table 5, and Annex C),
2) The maximum hole diameter for the grip has been corrected for diameters 5 mm and 6 mm (see Table 11), and reference to additional proof load specifications has been added for prevailing torque nuts (see 10.1);
5
h) In relation to hardness:
1) The reference Vickers hardness values have been recalculated, and conversion into Brinell and Rockwell hardness has been adjusted (see Introduction and 8.3),
2) Hardness determined on the bearing surface (see 10.2.4 a) and hardness determined in the transverse section at mid-height of the nut (see 10.2.4 b) have been added for routine inspection,
3) The test method for hardness determined in the thread has been improved and the test force has been specified according to the pitch dimension (see 10.2.5),
4) For QT nuts, the test methods for hardness in the core (see 10.2.6) and uniformity of hardness (see 10.2.7) have been added,
5) Requirements for hardness have been clarified (see 10.2.8 and 10.2.9);
6
j) Inspection documents have been referenced in accordance with ISO 16228 for fasteners (see 9.4);
k) Marking and labelling have been revised, and all nuts conforming to this document are to be marked whatever their shape (see 11);
m) Annex B, Design principles for nuts, has been improved; and
n) Annex C, Nominal stress under proof load, has been added.