Hillman 812623 1/2X5 Carriage Bolt, Black, 1/2 x 5 Inch

Carriage Bolts are designed to fasten a wooden face to either wood or metal Flat head provides a semi-flush finish to applications The heads is designed to eliminate the need for a washer Square underside of the head is self locking to eliminate the need for a driving tool Galvanized finish is perfect for rust prevention, Manufacturer: The Hillman Group