diameter tolerance specified for the particular thread size the extent to which the major diameter is decreased is limited to some extent by the loading requirements in a more particular embodiment the externally threaded body member has a course thread size of 4 mm or more and the thread has a major diameter not less than 7 7 less than an industry standard basic major diameter specified for the corresponding thread size according to this alternative interpretation of fig1 the major diameter is approximately the same as the pitch diameter the pitch diameter may be an industry standard for example the iso industry standard basic pitch diameter specified for a particular thread size in other embodiments however the pitch diameter may be outside industry standard basic pitch diameter tolerance 0043 fig2 illustrates mated internal and external threads having an increased clearance therebetween that is 200 in relation to the clearance illustrated in fig4 in one embodiment the clearance in fig2 is increased by increasing the pitch diameter of the internal thread according to this configuration the tooth 30 in fig2 is of an internal thread formed in a bore for example of the coating clearing nut 20 of fig5 7 in an alternative embodiment the clearance in fig2.