Product name: Conctete screw, window frame screw 
Specification: 7.5x42 ----7.5x232 
Packing: In cartons or bulk 
Head: Torx head T30 , T25 
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.