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ISO 21670-2014 pdf free download
ISO 21670-2014 pdf free download.Fasteners — Hexagon weld nuts with flange
Fixations — Ecrous hexagonaux a souder, a em base plate.
This ISO 21670 specifies characteristics for hexagon weld nuts with flange, with sizes MS to M16 (coarse thread) or D = 8 mm to 16 mm (fine pitch thread), of product grade A.
Weld nuts conforming to this International Standard are suitable for use with bolts of property classes up to 10.9 according to ISO 898-1.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 724, Iso general-purpose metric screw threads — Basic dimensions
ISO 898-1, Mechanical properties offasteners made of carbon steel and alloy steel — Part 1: Bolts, screws and studs with specified property classes — Coarse thread and fine pitch thread
ISO 898-2, Mechanical properties of fasteners made of carbon steel and alloy steel — Part 2: Nuts with specified property classes — Coarse thread and fine pitch thread
ISO 965-3. ISO general purpose metric screw threads — Tolerances — Part 3: Deviations for constructional screw threads
ISO 3269, Fasteners — Acceptance inspection
ISO 4759-1, Tolerances for fasteners — Part 1: Bolts, screws, studs and nuts — Product grades A, Band C
ISO 6157-2, Fasteners — Surface discontinuities — Part 2: Nuts
ISO 8992, Fasteners — General requirements for bolts, screws, studs and nuts
Nut dimensions shall be as given in EigurcJ and Table 1.
If quenching and tempering of the nuts is required, the hardness shall not exceed 300 NV.
Use of free-cutting steel is not permissible.
If a specific steel is required, this shall be agreed on ordering.
Weld nuts with flange shall be of product grade A in accordance with ISO 4759-1, with threads in accordance with ISO 724, however, with tolerance class 66 in accordance with ISO 965-3.
4.4 Mechanical properties
Weld nuts according to this International Standard shall meet the proof load values as specified in
Table 2. The proof load test shall be in accordance with ISO 898-2.
In case of dispute. welding projections shall be removed prior to testing.ISO 21670-2014 pdf free download.
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