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ISO 7043-2012 pdf free download
ISO 7043-2012 pdf free download.Prevailing torque type hexagon nuts with flange (with non-metallic insert), style 2— Product grades A and B
Ecrous hexagonaux a embase, auto freinés (a anneau non metallique), style 2— Grades A et B.
This ISO 7043 specifies the characteristics of prevailing torque type hexagon nuts with flange (with non-metallic insert), of style 2, with threads from M5 to M20 inclusive, in product grade A for threads up to and including M16 and product grade B for threads above M16, and with property classes 8, 9 and 10.
NOTE The dimensions of the nuts correspond to those given in ISO 4161 plus prevailing torque feature.
If other specifications are required, they can be selected from existing International Standards, for example
ISO 261, ISO 724, ISO 898-2, ISO 965-2, ISO 2320 and ISO 4759-1.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 225, Fasteners — Bolts, screws, studs and nuts — Symbols and descriptions of dimensions
ISO 261, ISO general purpose metric screw threads — General plan
ISO 724, ISO general-purpose metric screw threads — Basic dimensions
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 965-2. Iso general purpose metric screw threads — Tolerances — Part 2: Limits of sizes for general purpose external and internal screw threads — Medium quality
ISO 2320, Prevailing torque type steel nuts — Mechanical and performance properties
ISO 3269, Fasteners — Acceptance inspection
ISO 4042, Fasteners — Electroplated coatings
ISO 4759-1, Tolerances for fasteners — Part 1: Bolts, screws, studs and nuts — Product grades A, B and C
ISO 6157-2, Fasteners — Surface discontinuities — Part 2: Nuts
ISO 8992, Fasteners — General requirements for bolts, screws, studs and nuts
ISO 10683, Fasteners — Non-electroiytically applied zinc flake coatings
See Figure 1 and Table 1.
A.1 Recommended method for gauging of hexagon See Figure A.l and Table Al.
The nut shall be gauged using two plain ring gauges, A and B. to demonstrate the coincidental acceptability of hexagon height, wrenching height, corner fill and width across corners. Gauge A shall be placed over the hexagon and shall be seated on the flange. Gauge B shall be placed on the top of the nut normal to the nut axis. The two gauges shall not be in contact.
A.2 Recommended method for gauging flange thickness See Figure A.l and Table Al.
Gauge C is a flat feeler or ring gauge. It is used to prove that the flange thickness at the junction of the gauge with the hexagon portion is equal to or greater than specified values. The acceptance criterion is that gauge C fits under gauge A without contact where the nut is seated on a flat plate.ISO 7043-2012 pdf free download.
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