8-32 x 5/8 Carriage Bolt Fully Threaded Black Oxide and Oil 1 1/8-12 and they have a square

and they have a square head for easy driving

while the Grade 5 rating indicates its ability to withstand demanding applications

The 5/8-11 x 1 1/2 Hex Cap Screw Grade 5 Zinc is a high-quality fastener designed for use in a variety of applications

The screw features a hex head for easy driving and a coarse thread for secure holding power

8 grade ensures reliability and performance under demanding conditions

8-32 x 5/8 Carriage Bolt Fully Threaded Black Oxide and Oil 1 1/8-12 and they have a squareThe 8 32 x 5 8 Carriage Bolt Fully Threaded Black Oxide and Oil is a high quality fastener designed for a variety of applications. It is made of durable steel and features a black oxide finish for corrosion resistance. The fully threaded design provides maximum holding power, while the oil finish helps to prevent rust and seizing. This bolt is perfect for use in wood, metal, and plastic applications.