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UL 1598 5.10.2 Self-threading screws, including sheet-metal screws, used to secure electrical or enclosure
5 K7 v4 C* F% ycomponent parts in place or together, shall comply with the self-threading screw torque test in Clause0 Q& C: \) U1 W( P! ]# x
16.14, when the screw threads into nonferrous metal or polymeric material.
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0 b1 [$ F3 M2 o$ U1 B$ O这里讲了when the screw threads into nonferrous metal or polymeric material.,要做self-threading screw torque test
5 l9 a9 e2 G, c( E# u: z如果旋入的是其他材料 比如陶瓷呢?
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