scope:

This Defence Standard specifies the requirements for five natural rubber compounds designated NR QX followed by a number equal to the nominal hardness of the vulcanizate as given in Table A. Black or white versions of each quality are specified. The production of fabricated items such as sealing rings, gaskets, sheet and items cut or punched from sheet or cut from tube

The designation 'Type QX' indicates that the material is suitable for certain applications where a high degree of compatibility with explosives is a requirement. However, compatibility with all explosives in all environments has not been established and Design Authorities should seek advice on particular applications from the Director, Defence Research Agency (Military Division), Fort Halstead, Sevenoaks, Kent TN14 7BP.

Attention is drawn to Defence Standard 13-102, Testing of Materials which are Required to be Compatible with Explosives.

The vulcanized mixes do not necessarily have good electrical insulating properties