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JIS B 1052-2:2009

JIS B 1052-2:2009

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Mechanical properties of fasteners – Part 2: Nuts with specified proof load values-Coarse thread

Published By Publication Date Number of Pages
JIS 2009-11-20 24
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This Standard specifies the mechanical properties of nuts with specified proof load values (coarse thread) when tested at room temperature.

Properties will vary at higher and lower temperature.

It applies to nuts

– with nominal thread diameters d up to and including 39 mm;

– with diameter/pitch combinations according to JIS B 0205-2 (coarse thread);

– with thread tolerances 6H according to JIS B 0209-1 and JIS B 0209-2;

– with specific mechanical requirements;

– with widths across flats as specified in JIS B 1002 (shaded values are excluded);

– with nominal heights greater than or equal to 0.5d;

– made of carbon steel or low alloy steel (see NOTE 1)

It does not apply to nuts requiring special properties such as

– locking abilities (see JIS B 1056);

– weldability;

– corrosion resistance (see JIS B 1054-2);

– ability to withstand temperatures above +300 "C or below -50 "C (see NOTE 1).

NOTE 1 Nuts made from free-cutting steel should not be used above +250 "C.

NOTE 2 For special products such as nuts for high-strength structural bolting, and overtapped nuts for use with hot-dipped galvanized bolts, see the product standards for appropriate values.

NOTE 3 For assemblies with threads having tolerances wider than 6H/6g, there is an increased risk of stripping; see also table 1.

NOTE 4 In the case of thread tolerances other or larger than 6H, a decrease of the stripping strength should be considered (see table 1).

NOTE 5 The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows:

ISO 898-2 : 1992 Mechanical properties of fasteners-Part 2: Nuts with specified proof load values-Coarse thread (IDT)

The symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/IEC Guide 21-1.

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JIS B 1052-2:2009
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