Grey Phosphate Drywall Screw 3.5x25mm

Raw material :  Carbon steel 22A 
Head type : Bugle head with 4 ribs 
Thread type : Fine thread & twinfast thread 
Drive type : PH2 
Point type : Needle point 
Finish : Black Phosphate , Grey Phosphate ,Galvanized , Yellow Zinc，Nickel
Standard :DIN 18182
Surface : Matt black and dry, deep thread and sharp thread ,hardened ,heat treatment 
Diameter : 3.5mm -4.8mm ( #6 - # 10) 
Length : 13mm -152mm (1/2 " -6 ")
Packing : 
Small box packing :1000pcs or 500pcs per box ,16 or 20 boxes per carton 
Loose packing :  25kg or 50kg per gunny bag or brown carton  
Usage : Multi-used ,as usually used for connecting and fixing gypsum board to light steel keel . 
Place of origin : Tianjin City ,China 
Port of shipment :Tianjin port