Hex head bolts are a unique style of fixing used throughout the construction, automobile and engineering industries.  The hex bolt fixing is a reliable fastener for a wide selection of building projects and repair jobs. Sizes: Metric sizes range from M4-M64, inch sizes range from 1/4 '' to 2 1/2 ''. 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.