Bullone + dado + rondella secondo BS 4190 o equivalente (DIN 931) zincati a caldo (BS 729) M20x60 (Full Threaded) – 5313 pcs M20x260 (Threaded 80 mm) – 1607 pcs M20x300 (Threaded 90 mm) – 273 pcs M20x360 (Threaded 100 mm ) – 32 pcs