Black Phosphate drywall screw

1.Description: bugle head phillips drywall screw
2.Material: C1022a
3.Head: bugle head
4.Thread Type: fine/ coarse
5.Specification: 6#  7#  8#  10#
6.Size: 3.5*13-----4.8*100
7.Length: 13mm----100mm
8.Treatment: black phosphated
9.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!