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UL 1598 5.10.2 Self-threading screws, including sheet-metal screws, used to secure electrical or enclosure$ H; K" V' T7 H# H$ S
component parts in place or together, shall comply with the self-threading screw torque test in Clause0 ^# ~0 K v$ y
16.14, when the screw threads into nonferrous metal or polymeric material.! P, L0 X$ B- `. _7 X& z; I. P, G
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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
7 m( Y/ u: Z, m5 `7 C+ D9 d如果旋入的是其他材料 比如陶瓷呢?
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