scope:

This Standard relates t o polyester cored, cotton sheathed sewing threads used as components i n ammunition and specifies the material, methods of test and other requirements.

The designation 'Type QX' indicates that the material is of a quality suitable for certain applications where a high degree of compatibility with explosives is a requirement. However, its compatibility with all explosives in all environments has not been established, and Design Authorities should therefore seek advice on particular applications