DIN 18351 [Withdrawn] references following documents:

Document number Edition Title
DIN EN 20898-7 1995-04 Mechanical properties of fasteners - Part 7: Torsional test and minimum torques for bolts and screws with nominal diameters 1 mm to 10 mm (ISO 898-7:1992); German version EN 20898-7:1995 More 
DIN EN 28839 1991-12 Mechanical properties of fasteners; nonferrous metal bolts, screws, studs and nuts (ISO 8839:1986); german version EN 28839:1991 More