Concrete Screw

Product name: Conctete screw, window frame screw 
Specification: 7.5x42 ----7.5x232 
Packing: In small box or in cartons 
Head: Torx head T30 
Thread: Full thread, 
Surface: Yellow zinc plated 
Material: Carbon steel, C1022 
Original place: China 
Payment: FOB Shanghai 
Characteristics: Concrete screw (window frame screw) is used for building and we can provide our customers with different kinds and lengths concrete screw.