[Class : 6] Springs Of Metal; Disc Springs; Compression Springs (Metals); Extension Springs (Metal); Spiral Springs; Fasteners (Metal); Assemblies (Metal); Coper Coils (Metal); Common Metals And Their Alloys; Washers Of Metal; Lock Washers Of Metal; Wedge Locking Washers Of Metal; Nuts Of Metal; Screws Of Metal; Bolts Of Metal