Square bolts (also known as square head bolts or square head machine bolts) offer less danger of wrench slippage in hand wrenching, as well as a greater bearing area. In addition, the square head style is more secure than a hex bolt style when fixed into a cored recess.
Unit of Measure
Items
A307 GRADE A SQUARE HEAD BOLT, HDG (INCH)

1/4-20 X 3/4 SQUARE BOLT A307 GRADE A GALVANIZED
Web Price $427.35

A307 GRADE A SQUARE HEAD BOLT, HDG (INCH)

1/4-20 X 1 SQUARE BOLT A307 GRADE A GALVANIZED
Web Price $424.67

A307 GRADE A SQUARE HEAD BOLT, HDG (INCH)

1/4-20 X 1 1/4 SQUARE BOLT A307 GRADE A GALVANIZED
Web Price $409.55

A307 GRADE A SQUARE HEAD BOLT, HDG (INCH)

1/4-20 X 1 1/2 SQUARE BOLT A307 GRADE A GALVANIZED
Web Price $404.15

A307 GRADE A SQUARE HEAD BOLT, HDG (INCH)

1/4-20 X 2 SQUARE BOLT A307 GRADE A GALVANIZED
Web Price $348.02
Diameter N/A 1/4
Pitch N/A Coarse
Length N/A 3/4 N/A 1 N/A 1 1/4 N/A 1 1/2 N/A 2
Material N/A A307 Grade A
Finish N/A Galvanized
Package Quantity N/A 4000 N/A 3600 N/A 2800 N/A 2400 N/A 1600