Mechanical properties of fasteners; part 2: nuts with specified proof load values; coarse thread (ISO 898-2:1992); German version EN 20898-2:1993— 16 стр.
Mechanical properties of fasteners - Part 6: Nuts with specified proof load values; fine pitch thread (ISO 898-6:1994); German version EN ISO 898-6:1995— 10 стр.