4 requirements

4.1 illustrations

4.2 Materials

4.3 Marking

4.4 Hardness

4.5 proof torque

4.6 Nut end socket opening

4.7 finish

4.7.1 surface roughness

4.7.2 coatings

4.8 bolt clearance hole

4.9 internal drive opening

4.10 countersink of Nut end socket opening

4.11 dimensions

4.12 type3 universal sockets, single and double hexagon

5 test procedures

5.1 hardness see 4.4

5.2 proof torque test

5.3 coating process qualification test

5.3.2 coating process adhesion

5.3.3 coating process abrasion

5.3.4 coating process corrosion test (B117, 48hours)

6 designations

7 safety requirements and limitation of use

Sample Requirement: 5 pieces of samples

样品要求： 5件样品

Turnaround time: normal (9 working days)

所需时间: 标准(9个工作天)