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UL 1598 5.10.2 Self-threading screws, including sheet-metal screws, used to secure electrical or enclosure6 d2 e/ x, W6 e; {4 N# t4 F
component parts in place or together, shall comply with the self-threading screw torque test in Clause
$ J' T, C2 n9 p+ \3 k9 f" i16.14, when the screw threads into nonferrous metal or polymeric material.
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; q3 v5 x, [, @/ m% [这里讲了when the screw threads into nonferrous metal or polymeric material.,要做self-threading screw torque test
! e: i. O! M) u H- f( _如果旋入的是其他材料 比如陶瓷呢?
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