M20-2.50 x 160 Flat Socket Cap Screw 12.9 DIN 7991 Black Oxide

M20-2.50 x 160 Flat Socket Cap Screw 12.9 DIN 7991 Black Oxide . Alloy Flat Socket Head Cap Screws from Brighton Best. Hardness of RC 38-43, meets or exceeds DIN 7991. Manufactured from heat treated alloy steel, 1960 series.