1)Material: C1022 carbon steel
2)Dia:3.5mm,3.9mm(#6,#7)
3)Length:25mm, 35mm,45mm,55mm
4)Surface:, black or grey phosphated
5)Head:Flat bugle head Phillip recess
6)MOQ:1000,000pcs
7)Packing: bulk, small box packing