Black Phosphate Bugle Head Drywall Self Drilling Screws

We offer our customers a wide range of Black Phosphate Bugle Head Drywall Self Drilling Screws with following features :
Material: carbon steel C1022
Feature: black(grey)phosphate/zinc coated; bugle head, Phillips type, fine thread(twin thread) / coarse thread, drilling point, hardened.
Size: dia: 3.5, 3.9, 4.2, 4.8(#6-#10) length: 19mm-100mm
Usage: As fasteners, more and more widely used in hard wood, drop ceiling, furniture-making, gypsum board/plaster board decoration, sheet iron-machining, light steel joist and construction so on
Package: 1000pcs/box, 12/20boxes/carton or in bulk or as you require
Size: dia: 3.5, 3.9, 4.2, 4.8, 5.5, 6.3 (#6-#14), length: 13mm-150mm

3.5x253.9x134.2x164.8x16
3.5x353.9x164.2x194.8x19
3.5x453.9x194.2x224.8x22
3.5x553.9x224.2x254.8x25
3.5x653.9x254.2x324.8x32
3.5x753.9x324.2x384.8x38
a a a 3.9x384.2x454.8x45
a a 4.2x504.8x50
a a 4.8x60
4.8x70
4.8x80
Package: 25kg/carton as common or 1000pcs/box, 12-20boxes/carton or as you require
Usage: As fasteners, more and more widely used in sheet metal, drill holes in advance then locking.