Hexagon Flange Bolts with Plain Flange, made from robust steel material with a stainless steel surface treatment. These A4-70 flange bolts feature a hexagon head for optimal driving features. The right-thread direction and metric thread ensure a secure fit for a range of applications. The plain flange design spreads built-up forces and reducing surface pressure. Perfect for covering large or oversized holes without the need for washers, these bolts adhere to international standards including ASME ≈B18.2.3.4M, EN ≈1665, DIN ≈6921 and ISO ≈4162.