Description: Square Head Square Neck Bolts
Material: Carbon
size:M6-M56
Grade:4.6-12.9
Finish: Plain
Standard:BS7419
The size of Square Head Bolts is larger, facilitate bystron wrench gets stuck, or depend on other parts start-stop turn role; Can also be used in belt t-shaped slot of the components in order to adjust bolt position. Class C coach bolt often used to compare the rough structure.
Square neck in bolt mounting does not rotate. Used in the cart or hand car, because is wood, so use square, does not rotate, convenient tightened.