Material :Stainless Steel. The link shows that the inventory is all fake.
FINE PITCH NYLOC NUTS A2 STAINLESS STEEL FINE THREAD NYLON LOCK NUTS M8 M10 M12
M10 (1.0/1.25mm) FINE PITCH HEX SOCKET HEAD CAP SCREWS BOLTS STAINLESS STEEL
M10 x 1.25mm FINE PITCH CAP SCREWS ALLEN KEY SOCKET BOLT HIGH TENSILE BLACK 12.9
M10 x 1.25mm FINE PITCH SOCKET CAP SCREWS HIGH TENSILE BLACK 12.9 ALLEN KEY BOLT
M10 x 1.25 GRADE 10.9 HIGH TENSILE FINE PITCH PLAIN BLACK HEX BOLTS & SET SCREWS