M12 x 1.75p*30mm Metric Coarse Zinc Hex Bolts Class 8.7

Description

Product Introduction
This M12 x 1.75p * 30mm metric coarse tooth 8.7 grade galvanized hexagon bolt produced by VANGUARD INDUSTRIAL is a high-strength carbon steel fastener with a full tooth structure
Core parameters: The thread specification is M12, the pitch is 1.75mm, the nominal length of the screw is 30mm, and it adopts a full thread design, suitable for short stroke and small gap workpiece connection scenarios.
Performance level: 8.7 grade high strength, after heat treatment process, the nominal tensile strength can reach 800MPa, the yield strength ratio is 0.7, and the nominal yield strength can reach 560MPa. Its load-bearing and impact resistance are better than ordinary 4.8 grade bolts, and it is suitable for most medium heavy load conditions.
Surface treatment: The whole body is galvanized and passivated, which can effectively isolate water vapor and has excellent rust and corrosion resistance. It can be adapted to ordinary outdoor and humid working environments.
It is widely used in ordinary mechanical assembly, photovoltaic bracket fixation, lightweight steel structure connection, engineering equipment matching and other scenarios. When used in combination with nuts, flat washers, and spring washers of the same specifications, it can achieve stable and reliable component fastening connections.
🛠️ Usage
Preparation in advance
Confirm that the pre drilled hole size of the workpiece to be connected is compatible with the M12 screw, prepare the corresponding specifications of M12 hex nuts, flat washers, spring washers, and compatible socket or torque wrenches, and inspect the bolt threads in advance for defects such as burrs, deformation, and coating detachment to ensure that the threads are clean and free of debris.
Installation operation
Insert the bolt into the pre drilled hole of the workpiece, sequentially insert the flat washer and spring washer, and tighten the matching nut; When tightening, keep the direction of force applied by the wrench aligned with the axis of the screw to avoid tilting force. Use a torque wrench to evenly lock the bolt according to the standard torque value corresponding to the 8.7 grade bolt, and the best state is when the nut is exposed 1-2 teeth after tightening.
Precautions
It is not recommended to use a high-speed pneumatic wrench for locking to avoid thread locking and biting due to excessive locking speed; If the bolt experiences damage such as thread slippage or screw deformation after disassembly, it must be scrapped and cannot be reused.