Description:

Product Name: Hex Socket Button Head Bolts; Material: Alloy Steel; Surface Treatment: Blackening; Performance Grade: 10.9; Color: Black; Dimension: M4 x 8mm; Rod Length(Under Head): 8mm / 0.31"; Pitch: 0.7mm / 0.03".
Inner Hex Width: 2.5mm / 0.1"; Screw Head Size: 7.5 x 2.1mm / 0.3" x 0.08"(Dia.*Thickness); Package Content: 50pcs x Hex Socket Bolts.
Feature: Button head machine screws, hex socket drive. Metric machine screws for universal use. Standard hexagonal groove, smooth surface, excellent material, strong and durable. Deep thread, smooth arc, wear-resistant and anti-rust, even force and not easy to slip..
Material: Made of alloy steel, black oxide coating finish, wear-resistant, anti-corrosion, and it is smoother to use..
Application: Widely used where fastening is required, the assembly and maintenance of households, machine tools, construction, and DIY projects. Such as household hardware, electrical products, mechanical equipment products, etc..