Description:non-standard hexagonal bolt
size:M6-M56 1/4-2-1/8
Grade:4.8-12.9 Gr2-Gr8
Finish:Zinc Plated
Standard:non-standard
Equipped with a cylindrical threaded nut fasteners. Hexagon bolt is the most common bolts. In order to meet the needs of lock installation, a hole in the head, the shank hole, these holes can not bolt to come loose under vibration. Some did not threaded rod bolts to be painstaking, and called the slender bolts. This bolt is conducive to join forces by the change. There are special steel bolt, the head will become bigger and more, the size has changed.