ISO 7040-2012 pdf free.Prevailing torque type hexagon regular nuts (with non-metallic insert) – Property classes 5, 8 and 10.
ISO 7040 specifies the characteristics of prevailing torque type hexagon regular nuts (with non-metallic insert), with threads from M3 up to and including M36, in product grade A for threads up to and including M16 and product grade B for threads above M16. and with property classes 5, 8 and 10.
NOTE The dimensions of the nuts correspond to those given in ISO 4032 pIus 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 documents, in whole or in part, are normatively referenced in this document and are indispensable to its application. 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.
3 Dimensions
See Figure 1 and Table 1. Symbols and descriptions of dimensions are specified in ISO 225.
4 Requirements and reference International Standards
See Table 2.ISO 7040 pdf free download.