Drywall screw is a kind of combination using for construction industry .There are several kinds in our company ,such as :fine threads drywall screws ,coarse threads drywall screws ,high-low drywall screws .However the hi-low threads design has much more flat and sharp thread angle .The angle is 30 degree ,and lower threads is 60 drgree and the height of the thread only half of the higher thread ,the special design can decrease the torque ,increase the strength to pull and lower the braking riskd ,at the same time ,the bugle head has adopted the indented pressure without breaking the wallpaper or the Gypsum surface.
HEAD TYPE FLAT PAN HWH HWF BUGLE WAFER PAN WASHER OVAL FLOWER TRUSS ROUND DRIVE PHILLIPS SQUARE POZI SQUARE+PHIL TORX SLOTTED PHIL+SLOTTED OTHER POINT TYPE TEK#1 TEK#2 TEK#3 TEK#4 TEK#5 TYPE 17 THREAD TYPE TYPE-A BSB TYPE CSB TYPE HI-LOW MACHINE DOUBLE OTHER 10#-12 THD 6#-20 THD 8#-32 THD 12#-11 THD 7#-19 THD 10#-24 THD 14#-10 THD 8#-18 THD 12#-24 THD 10#-16 THD 14#-20 THD PLATING PLAIN ZINC PLATED COLOR ZINC PLATED BLUE ZINC PLATED BLACK PHOSPHATE GRAY PHOSPHATE BLACK ZINC PLATED WHITE ZINC PLATED BLACK OXIDE DECROTIZEO RUSPERT XYLAN NICKEL BRONZE SPRAY PAINT OTHER ADDITIONAL REQUEST SERRATION UNDER HEAD W / O WASHER W / BONDED WASHER W / PVC WASHER W / STEEL EPDM W/RUBBER WASHER W / HEAD MARK W / WING SLOTTED + WING OTHER
