螺丝头类型
平底锅, 平板型, 椭圆形, 圆形, 六角
Place of Origin
Handan, China
Item name
black phosphated corase thread dry wall screw
Surface treatment
black/gray phosphated, white/yellow zinc plated
Processing
heat treatment,plate,salt spray test
Point type
self tapping or self drilling
Thread
Fine Thread \ Coarse Thread