UNI 5735-1965 Screws with square nuts and wide bell head screws and bolts. ISO coarse pitch metric thread, replacing UNI 889, UNI 890 and UNI 9091). Class C
1965UNI 5735-1965 Screws with square nuts and wide bell head screws and bolts. ISO coarse pitch metric thread, replacing UNI 889, UNI 890 and UNI 9091). Class C