One-Slot Reverse Thread Screw

Product introduction

The round head slotted counter-thread screw is a fastener specially designed for special anti-loosening needs. Its core feature is the left-hand thread (reverse thread), which follows the reverse operation rule of "counterclockwise tightening, clockwise loosening", which can effectively resist the loosening tendency of the equipment during regular rotation and provide active anti-loosening protection. This product adopts a round head (semi-round head) design. The head contact area is large and it is not easy to screw into the workpiece surface. It is suitable for connecting thin plates and plastic parts where the depth of the screw hole is limited or it is inconvenient to process counterbores. Equipped with the classic one-line notch, the tool has strong versatility and is easy to install and disassemble. It is widely used in the left thread of clockwise rotating machinery such as fans and grinding wheels to prevent loosening due to inertia. It is an ideal choice for mechanical equipment, home appliances and occasions requiring special locking.

 

Product features

1. Core functions: reverse locking, active anti-loosening: left-hand thread (reverse thread) design: this is its most fundamental feature. Its thread direction is opposite to that of a regular screw and must be turned counterclockwise to tighten. This feature enables it to effectively resist the loosening tendency of equipment during regular clockwise rotation, providing active and reliable anti-loosening security for rotating parts.

 

2. Structural design: Large contact surface, strong pressing force: Round head (semi-round head) design: Unlike the flat head, the round head design makes the contact area between the head and the workpiece larger. When tightening, it can provide stronger pressing force and more stable support. It is especially suitable for workpieces that require large pre-tightening force or have soft materials, and can effectively prevent the head from sinking.

 

3. Easy installation: Universal tools, flexible application: Slotted slot: It can be operated with the most universal slotted screwdriver. The tools are easy to obtain, which reduces the threshold and cost of installation and maintenance. This design also has certain adaptability in situations where space is limited.

 

4. Comprehensive advantages: Combination of anti-loosening and universal use: This product perfectly combines the anti-loosening reliability of reverse teeth with the universal convenience of round heads and slots. It does not require special tools or additional accessories, and its own design can achieve excellent anti-loosening effects under specific rotating conditions. It is a cost-effective and dedicated solution.

 

Product application

1. Core anti-loosening areas: clockwise rotation equipment

Typical applications: left-hand threaded connections for fans, grinders, blowers, motors and other equipment.

Application principle: The main shaft of these devices rotates clockwise when running, and conventional screws are prone to loosening due to inertia. Using counter-thread screws can take advantage of its "reverse tightening and smooth loosening" characteristics to achieve a tighter and tighter effect, fundamentally preventing loosening and ensuring safety.

 

2. Requires large pressing force and anti-loosening thin plate/soft material connection

Typical applications: fixation of home appliance casings (such as washing machine side panels), sheet metal boxes, and plastic casings.

Application principle: The round head design provides a large contact area and pressing force, which can effectively avoid damaging the surface of thin plates or plastic parts during the tightening process. At the same time, the anti-thread feature provides additional vibration and anti-loosening protection.

 

3. Special locking and maintenance scenarios

Typical applications: Paired with conventional right-hand screws to form a two-way interlocking structure; also often used for repairs of old or specific equipment that require left-hand thread disassembly.

Application principle: Use its reverse thread to achieve mechanical interlocking on specific structures, or use it as a special left-hand thread accessory during maintenance.

 

FAQ

Q: What are the core features of this screw? What main problem does it solve?

A: Its core feature is the "left-hand thread" (reverse thread), that is, turn counterclockwise to tighten and clockwise to loosen. It is specially used to solve the problem of ordinary screws easily loosening due to inertia or vibration on clockwise rotating devices, and achieves active anti-loosening.

 

Q: Why choose the "round head" design? What is the difference between it and "flat head"?

A: The round head design provides a larger head contact area and stronger support. Compared with the flat head that requires counterbore, it is not easy to screw into the surface of the workpiece. It is more suitable for thin plate materials, plastic parts or situations where it is inconvenient to process counterbore. It can effectively prevent the workpiece from being damaged and provide greater pressing force.

 

Q: Why retain the seemingly traditional groove shape of “one-line groove”?

A: The main advantage of slotting is tool versatility. Any standard slotted screwdriver can be used, which is very convenient for on-site repairs, daily maintenance or in environments with limited tools, lowering the threshold for use and cost.

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