prEN ISO 898-6

Mechanical properties of fasteners - Part 6: Nuts with specified proof load values - Fine pitch thread prEN ISO 898-6

Scope

This part of IS0 898 specifies the mechanical properties of nuts with specified proof load values when tested at an ambient temperature range of + 10 °C to + 35 °C. Mechanical and physical properties will vary with respect to temperature and property class. Products conforming to the requirements of this part of IS0 898 are evaluated only at the ambient temperature range and may not retain the specified physical properties at higher and lower temperatures. At temperatures higher or lower than the ambient temperature range, a significant change in properties may occur. When fasteners are to be used above or below the ambient temperature range, it is the responsibility of the user to ensure that the mechanical and physical properties are suitable for his particular service conditions. This part of IS0 898 applies to nuts- with nominal thread diameters, d, from 8 mm up to and including 39 mm (fine pitch thread);- of triangular IS0 thread and with diameters and pitches in accordance with IS0 68 and IS0 262 (fine pitch thread);- with diameter/pitch combinations in accordance with IS0 261 (fine pitch thread);- with thread tolerances 6H in accordance with IS0 965-l and 965-2 (see note 2);- with specific mechanical requirements;- with widths across flats as specified in IS0 272;- with nominal heights greater than or equal to 0,5d”;- made of carbon steel or alloy steel.