screw number:4 mpa inner diameter:from 3.85 to 7.70 outer diameter:from 4.25 to 8.45

Technical parameters:

Nominal diameter(mm)            number(mpa)       inner diameter(mm)   outer diameter(mm) 

4.00                                         4                           3.85±0.05                   4.25±0.05

4.80                                         4                           4.60±0.05                   5.10±0.05

5.00                                         4                           4.80±0.05                   5.30±0.05

6.00                                         4                           5.80±0.05                   6.30±0.05

7.00                                         4                            6.70±0.05                  7.46±0.10

8.00                                         4                            7.70±0.05                   8.45±0.10

Screw P.C. wire