We are Tianjin HuaZhen Industrial&Trading Co, Ltd based in Tianjin , China. We are member of Tradekey.com since December, 2008. Our business is related to Construction & Real Estate industry and we specifically deal in nail,screw. Please find our product details below: self tapping screw Self tapping screw: Drive: many kinds of drive Thread type:ABtype Head type:many kinds of head type Diameter:M 3.5 M3.9 M4.2 M4.8 M5.5 M6.3 Length:from 19mm to 254mm Material:c1022 Finish:yellow/blue zinc plated/Nickel plated/others Drywall screw Drywall screw: Head Type:Bugle Thread type:Fine or Coarse Diameter:M3.5 M3.9 M4.2 M4.8 Length:from 13 mm to 254mm Material:c1022 Finish:black/gray phosphated/yellow/bule zinc plated Packing: bulk or smal packing or according to customer&＃039;s request Self-drilling screw Self-drilling screw Drive:many kinds of drive Thread Type:Coarse Fine Wing Teks Head Type:many kinds of head types Diameter:M3.5 M3.9 M4.2 M4.8 M5.5 M6.3 Length:from 9.50 to 125 mm Material:c1022 Finish:black/gray phosphated/yellow/blue zinc plated Packing:bulk or small packing chipboard screw Chipboard screw: Head Type:countersunk Thread Type:singlethread Diameter:M3.0 M4.0 M4.5 M5.0 M6.0 Length: from 10mm to 254mm(or according to customers&＃039; request) Material:c1022 Finish:black/grey phosphate, yellow /blue zinc plated , nickel plated , others Thank you for taking the time to go through our business profile. If there are any question, inquiry or comments, please feel free to contact us.