furniture Hardware Machine screws

The mechanical properties of Grade: 4.8, 8.8, 9.8, 12.9 (only applicable to the thread diameter of ≤ 16mm specifications) Surface: galvanized, black, antique copper, nickel, copper trough type: Cross slot, Composite slot, with 1.6, 1.6 outside the compound outside the slot-type hexagonal head: first, Shen Ping, in the first half Park, the first park, the flat, with edge, with flower-tooth thread: Germany, the United States, Japan, Britain, the metric system, Will be locked tight, self-locking, solid-resistant, drop-resistant, and so on