Product Name: Hexagon / Square Head Bolts / ScrewsPlace of Origin: ChinaFeatures: 1) Materials: Carbon steel, alloy steel, stainless steel, brass, Nylon, EPDM 2) Property classes: 4.8-12.9, 04, 05, A2-70, A4-80, SAE grade 2-8, A194-2H, B7 3) Hexagon head can be slotted 4) Production standard: DIN, ISO, BS, AS, ANSI, UNI, NFE, EN, JIS