Solid brass.
SOLID BRASS DOME NUTS HEXAGON DOME NUT FOR METRIC SCREWS M4 M5 M6 M8 M10 M12
M3 M4 M5 M6 A2 SOLID BRASS SLOTTED MACHINE SCREWS METRIC PAN HEAD BOLTS DIN85
M3 M4 M5 M6 M8 SOLID BRASS NUTS FULL HEXAGON NUT TO FIT METRIC BOLTS & SCREWS
SOLID BRASS DOME NUTS FOR METRIC BOLTS & SCREWS M3 M4 M5 M6 M8 M10 M12
ALUMINUM COUNTERSUNK HEAD SOLID RIVETS METRIC SIZES
Solid Brass Slotted Unslotted Brushed Brass Brushed Copper Satin Nickel White