如果不是焊, 選擇正確的螺絲, 直接決定了steel stud建築的質量。牙紋, 尖尾由最後一層或主要層決定, 頭型有表麵材料決
所以, bugle head for drywall surfaces
fine thread, sharp point for light ga steel, selfdrilling point for heavy ga steel, coarse thread sharp pt for wood/soft wood studs
所以, bugle head for drywall surfaces
fine thread, sharp point for light ga steel, selfdrilling point for heavy ga steel, coarse thread sharp pt for wood/soft wood studs