A double-bit 3mm stainless steel quarter-turn lock is a secure and durable locking mechanism used in industrial enclosures, electrical cabinets, and utility boxes. The double-bit design requires a special key with two notches (or "bits") to operate the lock, providing higher security compared to simpler mechanisms like slotted or triangular inserts. The 3mm measurement typically refers to the dimension of the key insert, ensuring that only the correct key can engage the lock. This type of lock is commonly found in high-security applications where controlled access is essential.

Key Features:

1. Quarter-Turn Mechanism:

   • The lock operates with a 90-degree turn to engage or disengage the cam, making it easy to lock or unlock the enclosure.
   • This mechanism is popular in industrial applications due to its reliability, simplicity, and ability to provide a secure closure with minimal effort.

2. Double-Bit Insert:

   • The double-bit design offers an additional layer of security because it requires a specific key with two precise notches to operate the lock.
   • 3mm refers to the dimension of the insert, meaning it will fit only keys that match this size and shape.
   • Double-bit locks are frequently used in utility panels, industrial enclosures, and other applications where restricted access is necessary to prevent unauthorized tampering.

3. Material - AISI 304 or 316 Stainless Steel:

   • AISI 304 stainless steel is known for its excellent corrosion resistance and durability, making this lock suitable for both indoor and outdoor environments, including harsh industrial and marine applications.
   • In environments with high exposure to chemicals or saline conditions, AISI 316 stainless steel may be used for even better corrosion resistance.
   • The brushed or polished finish ensures a professional appearance and helps protect the lock from wear and scratches over time.

4. Applications:

   • Electrical and Industrial Enclosures: Used in control panels, distribution boxes, and machinery covers where both frequent access and enhanced security are required.
   • Utility Boxes: Commonly found in public infrastructure such as telecom, gas, water, and electricity meter boxes, where the double-bit key ensures only authorized personnel can access sensitive areas.
   • Telecommunication Cabinets: Protects critical equipment from unauthorized access while allowing easy entry for maintenance teams.
   • Public Infrastructure: Frequently used in kiosks, street furniture, or public systems where tamper-proof access is essential.

5. Security:

   • The double-bit insert provides greater security than other insert types (such as slotted or triangular), as it is harder to bypass and requires a specialized key.
   • The 3mm size ensures compatibility only with specific double-bit keys, reducing the risk of unauthorized access by users with general-purpose keys or tools.

6. Advantages of Stainless Steel Construction:

   • Corrosion Resistance: The use of AISI 304 stainless steel ensures that the lock will withstand exposure to moisture, harsh weather, and corrosive environments, making it ideal for outdoor applications and industrial use.
   • Durability: Stainless steel provides excellent strength, allowing the lock to endure regular use and resist physical tampering or damage.
   • Low Maintenance: The brushed or polished stainless steel finish is resistant to wear, ensuring a long-lasting, professional appearance with minimal upkeep.

7. Additional Features:

   • Compression Mechanism: Some quarter-turn locks feature a compression function that helps achieve a tight seal, often necessary for enclosures requiring IP-rated protection against dust and moisture (e.g., IP65 or higher).
   • Anti-Vibration Design: In environments with heavy machinery or vibrations, the lock can be designed to resist loosening or accidental opening due to vibrations.

Conclusion:

A double-bit 3mm stainless steel quarter-turn lock is an ideal choice for applications that require both convenient access and high security. The double-bit mechanism provides enhanced protection against unauthorized entry, while the AISI 304 stainless steel construction ensures long-lasting durability and resistance to corrosion. This lock is widely used in industrial settings, utility enclosures, and public infrastructure where secure, reliable access is critical. Its robust design and security features make it a valuable component in any enclosure requiring restricted access.