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UL 1598 5.10.2 Self-threading screws, including sheet-metal screws, used to secure electrical or enclosure5 K& d: J9 ^: |
component parts in place or together, shall comply with the self-threading screw torque test in Clause5 w0 R* z; ~7 d5 q7 v( w
16.14, when the screw threads into nonferrous metal or polymeric material.
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这里讲了when the screw threads into nonferrous metal or polymeric material.,要做self-threading screw torque test
* k0 G6 G* t* Y2 j* Y- k" T: {如果旋入的是其他材料 比如陶瓷呢?( n: g9 l4 e: ~% ]
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