Description
This 5/16 “x 18 TPI x 1” full tooth UNC coarse tooth galvanized external hexagon bolt produced by VANGUARD INDUSTRIAL is a carbon steel fastener that complies with the US unified thread standard:
Core parameters: Adopting UNC unified coarse thread system, with a nominal diameter of 5/16 inches and 18 tooth pitches per inch length. The nominal length of the screw is 1 inch, and the full thread design enables effective engagement of the screw throughout the entire process, suitable for connection scenarios with thin workpieces and small gaps.
Process characteristics: The overall galvanizing and passivation treatment can effectively isolate water vapor and corrosive media, with excellent rust and corrosion resistance, and can be adapted to ordinary outdoor and humid working environments.
Adaptation scenarios: As an American standard fastener, it is widely used in mechanical equipment assembly, universal component fastening, and conventional engineering matching scenarios that adopt the British standard. When used in conjunction with UNC standard nuts, flat washers, and spring washers of the same specifications, it can achieve stable fastening connections for quick disassembly and assembly. Compared to fine thread fasteners of the same specifications, it has higher shear strength and better assembly efficiency.
🛠️ Usage
Preparation in advance
Confirm that the pre drilled hole size of the workpiece to be connected is compatible with a 5/16 inch screw, prepare corresponding UNC standard matching nuts, flat washers, spring washers, and compatible socket 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, avoid tilting and applying force, and lock evenly until the hexagonal head is completely pressed against the surface of the workpiece.
Precautions
This is a UNC standard thread in the imperial system and cannot be mixed with metric bolts and nuts of the same diameter, otherwise there may be problems such as thread misalignment, slipping, and even connection failure; It is not recommended to use a high-speed pneumatic wrench for locking to avoid thread locking and biting due to excessive locking speed.
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