沉头 countersunk head
- 沉头内六角攻丝螺钉。
Hexalobular socket countersunk head tapping screws. - 裸露扣件:除非另外注明,需提供裸露的十字槽沉头螺钉和螺栓。
Exposed Fasteners: Unless otherwise indicated, provide countersunk fiat Philips heads for exposed screws and bolts. - 裸露扣件:除非另外注明,需提供裸露的十字槽沉头螺钉和螺栓。
Exposed Fasteners: Unless otherwise indicated, provide countersunk flat Phillips heads for exposed screws and bolts.
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