1 Manufacture
2 Screw threads
3 Anti-corrosion treatment
4 Selection for testing
5 Mechanical test
6 Marking
7 Material
8 Manufacture
9 Design and dimensions
10 Material
11 Manufacture
12 Design and dimensions
13 Freedom from defects
14 Heat treatment
15 Selection and preparation of mechanical test samples
16 Mechanical tests
17 Hardness tests
18 Magnetic crack detection