Spojovací součásti - Šrouby s plochou zaoblenou hlavou se sníženou zatížitelností - Část 2: Šrouby s plochou zaoblenou hlavou s vnitřním šestihranem a nákružkem (Norma k přímému použití jako ČSN).
NORMA vydána dne 1.7.2023
Designation standards: ČSN EN ISO 7380-2
Classification mark: 021145
Catalog number: 517070
Publication date standards: 1.7.2023
The number of pages: 24
Approximate weight : 72 g (0.16 lbs)
Country: Czech technical standard
Kategorie: Technické normy ČSN
This document specifies the characteristics of hexagon socket button head screws with collar, with reduced loadability due to head design, in steel, with metric coarse pitch threads M3 to M16, and with product grade A.
If in certain cases other specifications are requested, dimensional options can be selected from ISO 888 or ISO 4753.
NOTE - The reduced loadability (related to the head dimensions in combination with penetration of the hexagon socket specified in this document) implies a limitation of ultimate tensile load shown by a specific marking (property class preceded by a zero). The loadability in the head is assumed to be 80 % of that in the thread for all sizes and all property classes, see Table 4