Cap Screw Factory introduces you to the matters needing attention in bolt quality.
(1), surface rust, oil pollution, bolts and bolt hole wall burr, flash, etc. shall be cleaned up.
(2) The contact friction surface shall meet the specified scratch resistance coefficient after treatment. The high-strength bolts used shall be provided with matching nuts and washers, which shall be used in accordance with matching and shall not be exchanged.
(3), handle the component friction surface installation are not allowed to be stained with oil, dirt and other debris.
(4) The friction surface of the components shall be kept dry during installation and shall not be operated in rain.
(5) Strictly check and correct the deformation of connected steel plates before installation.
(6) It is forbidden to hammer the bolt during installation to prevent the screw thread of the bolt from being damaged.
(7) Electric wrenches that are regularly tested during use Roofing Bolts ensure the accuracy of torque and operate in the correct tightening sequence.