Cross Recessed Hex Type Head Bolts Indentation

Xiaoguo® supplies Cross Recessed Hex Type Head Bolts Indentation: Hex heads withstand heavy torque while cross slots enable rapid alignment. Hardened threads create threads independently, widely applied in automotive, electronic and mechanical industries. Custom dimensions and surface finishes are offered.

Under what circumstances would you choose Cross Recessed Hex Type Head Bolts Indentation?The cross slot and hexagonal head appear simultaneously on a single screw. This is not for aesthetic purposes, but to address two practical contradictions in the installation process: both speed and tightness are required; both convenience and reliability are needed.

1.Scene 1: Assembly Line Operation

Question: Ordinary slotted screws tend to slip when being fully tightened; hexagonal heads require the use of sleeves at all times, which results in low work efficiency.

Solution: Workers at the first station use a cross-slot screwdriver, while those at the second station use a hexagonal socket to lock with the preset torque. No tool heads need to be changed at either station, resulting in high efficiency.

2.Scene 2: Equipment Maintenance

Question: At the after-sales repair site, there is no guarantee that every technician will have a dedicated hexagonal wrench or a Phillips screwdriver.

Solution: Use Cross Recessed Hex Type Head Bolts Indentation throughout the equipment. The master can dismantle it with a cross-head screwdriver, a socket wrench, or even an adjustable wrench.

3.Scene 3: Plastic parts or thin-walled parts

Question: When using ordinary self-tapping screws to screw into a plastic casing, if the screws are tightened too tightly, the head is prone to cracking at the bottom of the cross slot.

Solution: The design of the concave cavity eliminates the problem of concentrated stress at the sharp corners at the bottom of the cross groove.

4.Scene 4: Requires high torque but with limited space

Question: In some positions, the screwdriver cannot be inserted properly, or the hands are unable to exert sufficient force.

Solution: Use a socket and a wrench to apply force and tighten the hexagonal head from the side.

Working principle

The working principle of the Cross Recessed Hex Type Head Bolts Indentation is based on the cutting/pressing forming of self-tapping threads and the torque transmission of the compound drive system.

1.bottom hole

Pre-drill or punch a bottom hole on the connected component.The function of the bottom hole is to guide the screws and control the space for material flow.

2.Incorporation into thread forming process

Insert the tip of the Cross Recessed Hex Type Head Bolts Indentation into the bottom hole, and apply rotational and axial thrust with a tool. First, enter the bottom hole, and the hole opening slightly expands. Then, the surface-hardened self-tapping thread comes into contact with the hole wall. The thread teeth will exert intense compression on the material of the hole wall, forming a spiral groove that matches the screw thread.

3.Locking and Self-locking

When the screw reaches the predetermined depth, it stops. The connected material undergoes a slight rebound within its elastic limit, tightly gripping the screw threads and generating a huge frictional resistance, preventing the screw from loosening on its own.

4.Composite drive

The cross-head screwdriver is inserted into the slot and transmits torque through the four inclined surfaces.

The hexagonal wrench comes into contact with the hexagonal head and eventually locks in place.

The center depression eliminates the stress concentration at the sharp corners of the cross groove.