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Machine screw standard of nut with [onimenatto] and fingernail

  When the unit is fixed to the baffle by using the nut with [onimenatto] and the fingernail, a usual wood screw cannot be used. The machine screw ..M - of exclusive use.. is used. The machine screw of this M4 is a machine screw whose diameter is 4mm, and the one named M4 as which the nut with [onimenatto] and the fingernail is the same is used.

Machine screw of M4	Nut with fingernail of M4	[Onimenatto] of M4

  Then, does it only have to be used for the unit of which caliber the machine screw of which size?The method is only in this search for the size that can be inserted by matching the size to the actual thing of the unit used. However, please think to the end at the reference level though it is thought it is almost safe in the following standards for the speaker unit of [fosutekusu] that has been made up to now. (Even if the size is different, this one responsibility cannot be taken. )

Eight-centimeter unit and ten-centimeter unit   �� M4    
12-centimeter unit and 16-centimeter unit   �� M5  
More than 20-centimeter unit   �� M6