Pan Head Inner Torx Non-Standard Screws With Pad And Glue

Product introduction

The pan head inner torx rubber-coated screw with pad is a high-performance combination fastener that integrates anti-loosening, corrosion-resistant and convenient installation features. It cleverly combines the pan head, inner plum blossom groove, pre-installed gasket and pre-applied glue into one, which not only solves the problem that traditional screws are easy to loosen in a vibration environment, but also meets the diverse needs of various harsh industrial scenes.

 

Product design and features

The design of the pan head inner torx padded rubberized screws fully embodies the perfect combination of mechanical fastening and chemical locking. Its core features are as follows:

Efficient drive system: The product head adopts Internal Torx groove design. This design can evenly distribute the driving force over a larger contact surface, avoiding the "bulge" or "sliding teeth" phenomena that are prone to occur in cross or straight grooves. This not only protects the screw head coating from damage, but also significantly reduces tool wear and achieves firm positioning of the screws, which is especially advantageous in efficient assembly scenarios such as automatic locking lines.

 

Advanced anti-loosening technology: The screw threads are pre-coated with a special glue layer (such as nylon glue or anti-loosening glue). When the screw is screwed in, the glue layer between the threads is squeezed and broken to form a tough plastic filler, which generates strong friction at the thread engagement and has a permanent and strong anti-loosening effect. This chemical locking method is more reliable than traditional mechanical gaskets and can effectively solve the problem of pan-head machine nails easily falling off in a vibrating environment.

Integrated combination design: Gaskets (usually flat gaskets, elastic gaskets or tapered gaskets) are pre-installed on the screws, which avoids the trouble of losing or missing gaskets during installation and improves assembly efficiency. Among them, the design of the tapered gasket can utilize its resilience after being compressed to further improve the stability of the device.

 

Materials and application areas

Material selection: The main materials include carbon steel (such as grade 4.8, grade 8.8, suitable for general strength requirements), stainless steel (such as 304, 316, excellent corrosion resistance), alloy steel, copper, aluminum, etc. Among them, the 8.8 grade carbon steel material can provide high tensile strength, while the stainless steel material provides long-term protection against corrosive environments such as high temperature, humidity, oceans and chemical plants.

Surface treatment: In order to further improve performance, the product can undergo a variety of surface treatments, such as blue and white zinc, zinc-nickel alloy coating, etc. Zinc-nickel alloy coating (ZNSHL) does not contain hexavalent chromium, is environmentally friendly and has strong corrosion resistance. The salt spray test time can reach more than 360 to 720 hours.

 

Application areas

With its excellent anti-loosening and corrosion resistance properties, this product is widely used in:

Electronics and precision instruments: such as miniature non-standard screws in glasses, watches, and cameras.

Industry and construction: light steel structures, glass curtain walls, photovoltaic brackets, integrated houses, etc.

Transportation: automobile, ship, aircraft manufacturing, especially engine compartment or chassis parts that need to resist vibration and sulfide.

Heavy pollution and harsh environment: chemical factories, power plants, coastal areas and other places with extremely high corrosion resistance requirements.

 

Quality control and certification system

Quality system certification: Factories usually need to pass international certifications such as ISO9001, ISO14001, IATF16949 (automotive industry quality management system) to ensure standardization and traceability of the production process.

Whole-process quality control: Quality control runs through every step from raw material procurement, production and processing (such as cold heading, heat treatment) to finished product delivery. For screws with special shapes, optical, laser or mechanical screening methods are also used to ensure that their geometric dimensions and surface accuracy meet the requirements of a fully automatic assembly line.

Performance testing: Strictly implement international standards for salt spray testing (such as DIN EN ISO 9227 NSS) to verify corrosion resistance life, and conduct hardness and strength testing in accordance with DIN ISO 898-1 standards to ensure that the mechanical properties of the product meet standards.

 

Customized services

In order to meet engineering needs under specific working conditions, manufacturers usually provide highly flexible customization services. This service makes it possible to design and manufacture non-standard screws:

Non-standard geometric shapes: Specially shaped screws can be customized according to customer drawings or samples. Including special head types (such as short heads, ball heads), tail types (such as self-drilling tails, positioning pins) and special thread types (such as TAPTITE® self-locking threads). For example, T-screws or studs with special ends can be customized where precise mesh control is required.

Size and material customization: We provide non-standard customization of sizes from M1 to M16 or even larger. The material can be made of special alloy steel or specific grades of stainless steel.

Functional combination: In addition to the standard one-piece gasket, products with rubber gaskets, sealing rings or special coatings can also be customized to meet requirements for waterproofing, high and low temperature resistance or specific torque coefficients (the friction coefficient can be adjusted to 0.09μ - 0.14μ).

 

FAQ

Q: Why do I need glue on the screws?

A: There are three main purposes of screw dispensing (gluing): anti-loosening (filling the thread gap through the toughness of the adhesive film to resist vibration), sealing (replacing solid gaskets to achieve a tight imitation leakage seal) and anti-corrosion (preventing corrosive media from eroding the threads and increasing service life).

 

Q: What are the advantages of plum blossom slot over cross slot?

A: The inner plum blossom groove can evenly distribute the driving force over the entire contact surface instead of concentrating it on a few points. This means that the tool is less likely to slip, wear less, and can transmit greater torque. At the same time, the coating on the surface of the screw is protected from damage, making it very suitable for high-intensity assembly operations.

 

Q: Do you provide samples? How much do you charge for proofing?

A: Most manufacturers provide sample service. Generally, if there is a matching stock sample, it can be provided for free, and the customer only needs to bear the shipping cost; if it is a non-standard screw specially made according to the drawing, a reasonable proofing fee needs to be charged to cover the mold and debugging costs.

 

Q: How to ensure that glue-coated screws do not fail during storage?

A: The adhesive layer pre-coated on the screws is in a stable state when not installed, and its validity period is usually up to several years (such as 4 years). It is recommended to store the product in a dry, ventilated environment away from direct sunlight to prevent aging of the glue layer and oxidation of the coating.

 

Q: Can I customize special threads, such as T-shaped threads or self-tapping threads?

A: Yes. Professional fastener manufacturers have strong secondary processing and cold heading capabilities, and can customize special thread types according to application requirements (such as plastic parts, thin plate connection), including various special-shaped screws, self-tapping threads and complex T-shaped screws, etc.

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