EN 1667:1997

Prevailing torque type all-metal hexagon nuts with flange metric fine pitch thread (ISO 12126:1997, modified) EN 1667:1997

Publication date:   Oct 23, 2003

General information

90.93 Standard confirmed   Apr 13, 2023


CEN/TC 185 Fasteners

European Norm

21.060.20   Nuts



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This European Standard specifies the characteristics of prevailing torque type all metal hexagon nuts with flange and metric fine pitch thread with nominal thread diameters from 8 up to and including 20 mm, in product grade A for sizes d up to and including 16 mm and product grade B for sizes d > 16 mm and propertyclasses 6, 8 and 10.

Life cycle


EN 1667:1997
90.93 Standard confirmed
Apr 13, 2023