ISO 898-1:2013(EN)Mechanical properties of fasteners made of carbon steel and alloy steel —
Part 1: Bolts, screws and studs with specified property classes — Coarse thread and fine pitch thread
ISO 898-1:2013 was created by Technical Committee ISO/TC 2, Fasteners, Subcommittee SC 11, Fasteners with metric external thread.
ISO 898-1:2013 is the fifth edition and it cancelled and replaced the fourth edition (ISO 898-1:2009), of which it constitutes a minor revision.
ISO 898 consists of the following parts, under the general title Mechanical properties of fasteners made of carbon steel and alloy steel:
— Part 1: Bolts, screws and studs with specified property classes — Coarse thread and fine pitch thread
— Part 2: Nuts with specified property classes — Coarse thread and fine pitch thread
— Part 5: Set screws and similar threaded fasteners with specified hardness classes — Coarse thread and fine pitch thread
— Part 7: Torsional test and minimum torques for bolts and screws with nominal diameters 1 mm to 10 mm1)
ISO 898-1:2013 defines mechanical and physical properties of bolts, screws and studs made of carbon steel and alloy steel when tested at an ambient temperature range of 10 °C to 35 °C. Fasteners (the term used when bolts, screws and studs are considered all together) that conform to the requirements of ISO 898-1:2013 are evaluated at that ambient temperature range. They might not retain the specified mechanical and physical properties at elevated temperatures or lower temperatures.
Certain bolts and screws might not fulfill the tensile or torsional requirements of ISO 898-1:2013 because the geometry of their heads decreases the shear area in the head compared to the stress area in the thread. These include bolts and screws having a low or countersunk head
ISO 898-1:2013 is applicable to bolts, screws and studs
— made of carbon steel or alloy steel,
— having triangular ISO metric screw thread in accordance with ISO 68-1,
— with coarse pitch thread M1,6 to M39, and fine pitch thread M8×1 to M39×3,
— with diameter/pitch combinations in accordance with ISO 261 and ISO 262, and
— having thread tolerances in accordance with ISO 965-1, ISO 965-2 and ISO 965-4.
It is not applicable to set screws and similar threaded fasteners not under tensile stress (see ISO 898-5).
It does not specify requirements for such properties as
— corrosion resistance,
— resistance to shear stress,
— torque/clamp force performance (for test method, see ISO 16047), or
— fatigue resistance.
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