Dry Wall Screw Nails Handan Tianjia Fastener Co., Ltd. Base Info Model NO.:3.8x40mmStandard:DIN, GB, ANSI, JIS, BSW, GOSTType:Round HeadMaterial:Carbon Steel3.5-4.2:25"-32"Head Style:RoundGroove:WordGrade:9.8 Description Pre:Precise A563 2h Structural Stainless Steel Heavy Nuts High Quality Next:M5*8 Peek Screws