UNI 6419 - 1969 方螺母 Square Nuts For Manufacture of Railway and Tramway Rolling Stock - ISO Metric Coarse Thread - Finish C
UNI 5597 - 1965 方螺母,ISO公制粗牙螺纹,C级 Square nuts. Iso metric coarse thread. Finish c. Dadi quadri normali. Filettatura metrica ISO a passo grosso. Categoria C.