scope:

This part of the Def Stan comprises:

a) general information relative to the manufacture

b) material acceptance and test requirements peculiar to the elastomeric toroidal sealing O-rings of a relevant material composition

c) surface finish standards common to all elastomeric toroidal sealing O-rings

d) test tolerances

e) system and equipment applications

This Def Stan is applicable to all HM surface ships, submarines, ship and submarine systems including weapon systems and associated equipments

Exemptions: examples of the applications which will not be satisfied by the materials specified within this Def Stan are:

a) explosives

b) special electrical properties

c) those where there are environmental temperature requirements below -30°C

d) Where contract requirements deviate from this standard.