Drywall Screws are self tapping trumpet (Bugle) head screw
EN 14566: Mechanical fasteners for gypsum plasterboard system-Definitions, requirements and test methods JIS G3507-1 : Carbon Steels for Cold Heading _Part 1
Dimension :
Ø3.5x25(±1.5) mm
Ø3.5x35(±1.5) mm
Ø3.5x50(±1.5) mm
MATERIAL : SWRCH18A/1018A OR SWRCH22A/1022A | FINISH : Case Hardened Grey phosphate |