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UL 1598 5.10.2 Self-threading screws, including sheet-metal screws, used to secure electrical or enclosure
7 b. o) O) v/ @( ?$ Tcomponent parts in place or together, shall comply with the self-threading screw torque test in Clause2 \. Q: L8 c7 t! w/ f
16.14, when the screw threads into nonferrous metal or polymeric material.
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4 ^# E4 K1 s% C" m2 }+ t这里讲了when the screw threads into nonferrous metal or polymeric material.,要做self-threading screw torque test
- Y: B1 C/ l& x) s8 K4 E3 o, {如果旋入的是其他材料 比如陶瓷呢?
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