DIN 6900-4 (1990-12)废止
Screw And Washer Assemblies - Coarse Threaded Screws With Captive Serrated Lock Washer
出版：German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频
This standard is included in DIN Handbook 10. Specifies requirements for screw and washer assemblies consisting of a M 2,5 to M 10 screw with flat bearing face, assigned to a property class below 5.8, and a captive serrated lock washer. Serrated lock washers are mainly designed to provide electric contact between components coated with varnish, anti-corrosive agents or similar materials, by the tang ends of the washers piercing the coating when such components are joined. For such applications, the effectiveness of serrated lock washers shall be verified in accordance with the relevant DIN VDE Standards. If the washer is intended to prevent bolted connections working loose, this function shall be checked separately.
Supersedes DIN 6900 (07/2002)
SNV DIN 6900-4:1990 - Identical
