hex head self drilling screws with washer
1.Machine Screws are often used with nuts or driven into tapped holes
2.Stainless Steel is suitable where formability and cost are important considerations
3.Flat head style allows fastener to sit flush to the surface
4.Driven by a flat-bladed driver
5.Coarse threads are better for brittle materials, and will assemble and disassemble more quickly than fine threads
Application
Apply to metal plate, galvanized steel plate, metal curtain wall, metal light compartment, aluminum door and window, indoor 
and outdoor decoration.
General angle steel, channel steel, iron plate, PC board and other metal material combining installation.
Suitable for assembling steel roof, automobile body, container, shipbuilding industry, freezing equipment and so on.

Packaging 
1> Neutral packing :per 1000pcs or 500pcs per small box ,10box or 20 box per carton ,Without pallet 
2>Color packing : per 1000pcs per color box ,20 box per carton 
3>Bulk :20kg and 25kg per kraft paper bag 
4>Can be negotiate as you requirement