Hex flange bolts are one-piece head bolts that are flat surfaced. The flange bolts eliminate the need to have a washer since the area under their heads is wide enough to evenly distribute pressure, thus helping to compensate for misaligned holes. Hex Flange Bolts are typically used for automotive and construction applications. The flange directly underneath the hexagon-shaped head is designed to distribute the load and help protect the surface beneath and eliminates the potential need for a washer. Sizes: Metric sizes range from M6-M20, inch sizes range from 1/4 '' to 3/4 ''. Package Type: carton or bag and pallet. Payment terms: T/T, L/C. Delivery Time: 30 days for one container. Trade Term: EXW, FOB, CIF, CFR.