Pan wafer head glvanized self drilling screws
**Material: Carbon steel C1022
**Feature: Zinc coated (white, blue, color), drilling point.
**Size: 3.9x16mm, 3.9x19mm, 3.9x25mm, 3.9x32mm, 3.9x38mm, 3.9x50mm
4.2x16mm, 4.2x19mm, 4.2x25mm, 4.2x32mm, 4.2x38mm, 4.8x 50mm
**Surface treatment: Temper, galvanized
**Usage: As fasteners, more and more widely used in sheet metal, drill holes in advance then locking.
** Packing: Each inner box of 1000 pcs -500 pcs
** please refer to more self drilling screw as below: