Non-standard A4-80 Triple Security Cap Screws For Public Infrastructure Black Oxide Finish Hex Socket Guanbiao Hardware

A4-80 Triple Security Cap Screws/ Vandal Proof/ Public Infrastructure/ Hex Socket/ Batch Orders Guanbiao Hardware

Ultimate security A4 stainless steel cap head screws. Three-combination defense: tamper-resistant drive, permanent threadlocker & breakaway head. For utilities, transport & public fixtures. Passivated.

Protect critical infrastructure from vandalism and unauthorized access with our **High-Security Cap Head Hexagon Socket Three Combination Screws**. Engineered for maximum defense, these fasteners integrate **three independent security mechanisms**: 1) A **tamper-resistant pin-in-hex socket drive**, 2) A **permanent, high-strength pre-applied threadlocker**, and 3) A **breakaway/frangible hex head**. Made from corrosion-resistant A4 stainless steel, they provide an unparalleled permanent, vandal-proof solution for public utilities, transportation, and high-security enclosures.

Primary Uses & Applications:
* Utility boxes (electrical, telecom, gas, water).
* Public transportation fixtures (bus stops, rail trackside equipment).
* Traffic signal & control cabinet access panels.
* Bridge & tunnel infrastructure access points.
* Permanent security fencing & gate hardware.
* High-value asset protection (ATMs, vending machines - permanent installs).

Surface Treatment/Finishes:
* **Passivation (Standard):** Critical chemical process to maximize corrosion resistance by removing free iron and enriching the passive chromium oxide layer.
* **Electropolishing (Optional):** Enhances corrosion resistance, provides smoother surface (reduced friction during install), bright finish. Improves cleanability.

How to Use:

1. **Prepare:** Ensure female threads are clean, dry, and compatible (A4 nut/threaded hole recommended). Hole must accommodate full screw length *including* the breakaway head.
2. **Insert Screw:** Use the **specialized TR driver bit** (e.g., TR30 for M10) matching the screw size. Insert the screw into the hole.
3. **Tighten:** Apply torque using a calibrated torque wrench/driver. Tighten to the specified torque value for the size and material.
4. **Breakaway:** Once final torque is reached, **continue applying torque**. The specially designed **hex head will shear off cleanly** just below the top surface, leaving only a smooth, non-grippable cylindrical stud. *The screw is now permanently locked in place.*
5. **Removal:** **Extremely difficult and destructive.** Requires drilling out the screw remnant. Replacement requires re-tapping the hole.

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Dongguan Guanbiao Hardware Products Co., Ltd., established in 2013, is a screw hardware processing factory integrating R & D, production and sales, focusing on electronic and electrical appliances, computer radiator, communication equipment, lighting, motor, motor, medical equipment, sports equipment, auto parts, baby stroller accessories and other industries. Its main products include all kinds of iron, stainless steel, copper, aluminum and alloy Precision small screws, spring screws, loose screws, stainless steel screws, step screws, plum blossom screws, slender screws, anti-theft screws, non-standard customized screws, stainless steel rivets, shafts, pins, CNC parts and stamping parts. The first mock exam the second mock exam is two punch, two die four punch, three die six punch, four die four punch, six die six punch, die closing machine, part forming machine, automatic lathe, CNC lathe and so on, and the diameter is 1mm-20mm, the length is 1mm-300mm.

The company introduced imported automation equipment, combined with mature technology and precision equipment, to ensure product quality, control quality from the source, and adhere to technological innovation.

Our business philosophy is "integrity, innovation, efficiency, win-win", your satisfaction is our eternal pursuit, looking forward to become your sincere partner!    wechat:+8613423026460