Cylindrical Head Hexagon Socket Blind Hole Nut

Product introduction

The cylindrical head hexagonal blind hole nut is a special fastener with a cylindrical shape and a hexagonal blind hole driving groove machined in the center of the top. The nut has a smooth or threaded cylindrical surface on the outside and a fully threaded through hole on the inside. The hexagonal hole at the top is closed to form a "blind hole" structure. This feature makes it good at preventing dust and foreign matter from entering. This nut is mainly used in situations where concealed installation is required or space is limited. Its cylindrical shape can be embedded or interference-fitted in pre-processed mounting holes to achieve a flush or countersunk clean appearance. It can be firmly combined with other externally threaded parts by tightening it from the top with a standard Allen wrench. Because its top is closed, it can effectively prevent dust, liquid or debris from entering the internal thread area and avoid thread jamming or damage caused by accumulation of contaminants. It is especially suitable for use as a structural connection or adjustable support element in precision equipment, instrumentation, medical equipment and automated machinery that have requirements for cleanliness, sealing or appearance.

Product features

1. Compact structure, flush and beautiful installation

Its cylindrical shape allows the nut to be fully embedded or pressed into a prefabricated straight hole in the base part. After installation, the top can be flush with the surface, achieving a smooth, clean appearance without protrusions, saving space and avoiding interference.

2. The top is closed, with protection and sealing properties

The "blind hole" design means that the hexagonal drive hole is closed at the top. This structure can effectively prevent external dust, debris, liquid or fibers from entering the threaded area inside the nut, preventing thread contamination, corrosion or jamming caused by this, and improving reliability in harsh or sensitive environments.

3. Internal hexagonal drive, providing high torque tightening capability

It has an internal hexagonal drive and can be operated with a standard wrench. Compared with some outer edge drive forms, it can withstand higher installation and disassembly torques, has a more stable connection, and requires less surrounding space. It is especially suitable for sinking installation scenarios.

4. Multi-purpose installation and fixing methods

The outer wall of the cylinder can be designed as a smooth surface (for interference press fit) or with external threads (for screwing into the threaded hole of the base) as required, providing flexible and reliable installation options. The smooth-walled version relies on friction for permanent, non-removable installation; the externally threaded version allows for easy removal and adjustment.

5. Enhanced structural rigidity and load distribution

Because its cylindrical structure is fully supported in the mounting hole, the contact area with the base is large, which can distribute the load more evenly, reduce the pressure on the base material, and provide stronger anti-loosening ability and structural rigidity than standard hexagonal nuts.

Product application

1. Internal structural connection of precision equipment and instruments

It is widely used in internal frame connections of optical instruments, measuring equipment, high-end home appliances and precision machinery. Its flush installation feature does not interfere with internal moving parts, and the blind holes can effectively prevent internal grease from spilling or external dust from intruding, keeping the core area clean.

2. Modular installation of automation equipment and industrial robots

It is often used as a pre-embedded threaded connection sleeve in the quick interfaces of robot end effectors, conveyor line modules and replaceable fixtures. The nut can be pressed into the standardized hole of the aluminum alloy profile or steel platform, providing a strong, durable and beautiful thread foundation for frequently disassembled bolts, and facilitating modular assembly and maintenance of equipment.

3. Hygienic design of medical devices and food equipment

Suitable for equipment that needs to meet cleaning and hygiene standards. The smooth and flush surface has no sanitary dead corners and is easy to clean and disinfect thoroughly; the closed blind hole structure can prevent the retention of pollutants and the growth of microorganisms, complying with the hygienic regulations of relevant industries.

4. High-strength thread reinforcement for thin plate structures

In sheet metal parts, chassis or thin-walled structures, by pressing or screwing in the nut, a high-strength, high-load-bearing internal thread can be provided for the thin plate material, effectively avoiding the problem of insufficient strength and easy thread slippage caused by tapping directly on the thin plate, and significantly improving the reliability and durability of the connection point.

FAQ

Q: What problems does the "blind hole" design of this nut mainly solve?

A: The core purpose of "blind hole" design is protection and sealing. It can effectively prevent dust, chips, liquid and other contaminants from entering the internal thread area of ​​the nut from the top, thereby avoiding thread corrosion, jamming or seizure. It is especially suitable for occasions with high cleanliness requirements or harsh environments.

Q: How to fix the nut in the base hole during installation?

A: Threaded screw-in type (internal thread): The nut is directly screwed into the prefabricated thread on the base body. It is relatively convenient to install and disassemble, and is convenient for maintenance and adjustment.

Q: What are its advantages compared with ordinary hexagonal nuts or flange nuts?

A: The core advantages are embedded installation and clean appearance. It sinks completely into the component, leaving no protrusions on the surface, saving space and being beautiful. At the same time, the contact area between the cylinder and the base hole is large, the load distribution is more even, the resistance to loosening is stronger, and it has the unique anti-fouling ability of blind holes.

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