PMT Screws and Nuts Metric Quick Reference

Nominal Dia.- Lead Dynamic Load Rating (N) Static Load Rating (N) Root Diameter (mm) Torque to Raise 1kN (N·m) Nut
16 x 5 5.7 8.6 12.90 0.880 MPN
20 x 5 7.2 12.2 17.50 0.880 MPN
25 x 5 8.4 15.7 22.60 0.880 MPN
40 x 10 28.4 54.4 34.79 1.778 MPN
50 x 10 41.6 94.6 45.20 1.778 MPN
63 x 12 76.91 193 56.98 2.124 MPN

Nook ball screws are used in numerous maritime applications as seen in the image below.

Figure 1