|Description / Abstract
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|This part of ISO 898 specifies mechanical and physical
properties of set screws and similar threaded fasteners made of
carbon steel or alloy steel when tested at an ambient temperature
range of 10 °C to 35 °C. Fasteners (the term used when set screws
and similar threaded fasteners are considered all together) which
conform to the requirements of this part of ISO 898 are evaluated
at that ambient temperature range.
Fasteners in conformance with this part of ISO 898 are
classified to specified hardness classes and are intended for use
under compressive stress only.
NOTE Fasteners conforming to the requirements of this part of
ISO 898 are used in applications ranging from -50 °C to +150 °C. It
is the responsibility of users to consult an experienced fastener
metallurgist for temperatures outside the range of -50 °C to +150
°C and up to a maximum temperature of +300 °C when determining
appropriate choices for a given application.
This part of ISO 898 is applicable to set screws and similar
— made of carbon steel or alloy steel,
— having a triangular ISO metric screw thread in conformance
with ISO 68-1,'
— with a coarse pitch thread of M1,6 to M30, and a fine pitch
thread of M8×1 to M30×2,
— with diameter/pitch combinations in conformance with ISO 261
and ISO 262, and
— having thread tolerances in conformance with ISO 965-1 and ISO
It does not specify requirements for such properties as
— tensile strength,
— shear strength,
— corrosion resistance, or
— the ability to withstand temperatures above +150 °C or below
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