Fasteners > Bolts > Hex Bolts & Nuts | Class 4.6 Hex Bolt and Nut Galvanised | Class 4.6 Hex Bolt and Nut Galvanised | Class 4.6 | Hex Bolt and Nuts are manufactured to AS1111.1. | *** Thread Length may vary. Please contact AIMS to confirm thread length if it is critical for you***