This standard specifies requirements for screw and washer assemblies consisting of an M2,5 to M 12 screw with flat bearing face, assigned to property classes 8.8 up to and including 10.9, and a captive conical spring washer. Wave spring washers are intended to counteract loosening of bolted connections (e.g. as a result of setting) (cf. DIN 267 Part 26). They do not effectively prevent loosening of the connection under varying radial load and are thus designed for use with short screws predominantly subject to thrust.

Socket or cross recessed head screws the critical cross section of which is not located in threaded portion of the shank but in the head are not suitable for screw and washer assemblies. For further restrictions in the use of such screws, see the relevant product standards.