1) Name: self  tapping screw

2) Material:carbon steel 1010

3)Surface finish:white zinc or blue zinc or yellow zinc

4)Size:

3.0*(10,12,14,15,16,20,25,30)

3.5*(10,12,14,16,20)

4.0*(10,12,14,16,20,25,30,35,40,45,50,55)

5.0*(12,14,16,20,25,30,35,40,45)

5) without heat treatment or without harden

6)Samples free