Fine thread phillips drive bugle head black phosphate drywall steel screw
** key words: Gypsum screws, plaster board screws, drop ceiling screws
**material: Carbon steel c1022
**feature: Black(grey)phosphate/zinc coated; Bugle head, phillips type, fine thread(twin thread) / coarse thread, sharp point, hardened.
**size: Dia: 3.5, 3.9, 4.2, 4.8(#6-#10) length: 19mm-100mm
3.5x13 3.5x16 3.5x19 3.5x25 3.5x32 3.5x35 3.5x38 3.5x50
3.8x16 3.8x19 3.8x25 3.8x32 3.8x35 3.8x38 3.8x45 3.8x50
4.2x16 4.2x19 4.2x25 4.2x32 4.2x35 4.2x38 4.2x45 4.2x50
4.8x16 4.8x19 4.8x25 4.8x32 4.8x38 4.8x45 4.8x50 4.8x60 4.8x70 4.8x80 4.8x100...
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**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