GB/T 15856.1-2002 Translated English of Chinese Standard. (GBT 15856.1-2002, GB/T15856.1-2002, GBT15856.1-2002): Cross recessed pan head drilling screws with tapping screw thread [Buy--download True-PDF in 3-second: https://play.google.com/books > Sign in > This BOOK > "3-dots" > Export > Save as "*.pdf"]This Standard specifies the characteristics of cross recessed pan head drilling screws with tapping screw threads from ST2.9 up to and including ST6.3. |