MZ320-1 PA (Nylon) Black Quarter-Turn L-Handle Industrial Cabinet Lock with Zinc Alloy Lock Core

Full Technical Specifications

• Model Number: MZ320-1
• Housing and Handle Material: PA (polyamide / nylon) engineering plastic — black
• Lock Core Material: Zinc alloy
• Shaft Material: Steel, white zinc plated
• Fastenings: White zinc plated steel
• Surface Finish: Black PA housing and handle; white zinc plated shaft and fastenings
• Operation Type: Quarter-turn (90° rotation) opening or closing
• Handle Type: Curved ergonomic L-handle, 124mm height × 62mm width
• Housing Diameter: Φ50mm
• Shaft Type: M10 threaded shaft with C8 flat section (8mm with flat)
• Shaft Length: 69.5mm adjustable
• Overall Height: 87.5mm (including shaft), 54mm (housing only)
• Mounting Method: Through-panel with pressure plate (压板) and M10 nut fixation
• Mounting Cutout: Φ13mm, with left hand (LH) and right hand (RH) compatible positions
• Cutout Offset: 18.75mm between LH and RH cutout positions
• Additional Shaft Feature: Φ15mm extension at shaft end
• Lock Core: Integrated zinc alloy keyed lock core on handle face
• Hand Configuration: Reversible — compatible with both left-hand and right-hand door swing via dual cutout positions
• Core Features: PA lightweight corrosion-resistant construction, zinc alloy keyed lock core, M10 threaded adjustable shaft, pressure plate mounting, curved ergonomic L-handle, left/right hand reversible, quarter-turn 90° operation, chemical resistant, electrically insulating

Core Product Features & Advantages

1 High-Quality PA (Nylon) Construction for Lightweight Corrosion Resistance

The housing and curved L-handle are manufactured from PA (polyamide/nylon) engineering plastic, providing excellent corrosion resistance, chemical resistance, electrical insulation and self-lubricating properties. The black PA material is inherently resistant to rust, oxidation and most industrial chemicals, making it ideal for outdoor, chemical processing and harsh environment applications where metal locks would corrode or degrade. The lightweight construction also reduces overall equipment weight.

2 Zinc Alloy Lock Core for Robust Keyed Security

The lock core is fabricated from high-pressure die-cast zinc alloy, providing robust keyed security and reliable tamper resistance. The zinc alloy core ensures precise key engagement and long-term durability, while the integrated design creates a clean, unified appearance on the handle face. The keyed mechanism restricts unauthorized access to cabinet interiors, making it suitable for secure equipment enclosures.

3 Curved Ergonomic L-Handle for Comfortable High-Torque Operation

The curved ergonomic L-handle design (124mm height, 62mm width) provides a comfortable, high-torque grip that enables easy quarter-turn operation even when wearing work gloves. The curved shape fits naturally in the hand, allowing operators to apply consistent rotational force for smooth, reliable latching and unlatching. The extended handle length offers enhanced leverage for heavy doors or high-torque cam configurations.

4 M10 Threaded Adjustable Shaft with Pressure Plate Mounting

The M10 threaded steel shaft with C8 flat section (69.5mm adjustable length) enables secure through-panel mounting with pressure plate (压板) and nut fixation, accommodating a wide range of panel thicknesses. The threaded design provides a robust, vibration-resistant connection that can be precisely tightened to the specific panel thickness, while the C8 flat ensures positive, slip-free cam engagement. The pressure plate distributes the clamping force evenly across the panel for stable, secure installation.

5 Left/Right Hand Reversible Design for Flexible Installation

The lock features a reversible left/right hand design with dual cutout positions (Φ13mm, 18.75mm offset), allowing the same lock model to be used for both left-hand and right-hand door swing directions. The red circle indicates the left-hand (LH) cutout position and the green circle indicates the right-hand (RH) cutout position, providing clear installation guidance. This reversibility reduces inventory requirements and simplifies procurement for projects with mixed door configurations.

6 Quarter-Turn 90° Mechanism for Quick Effortless Operation

The quarter-turn mechanism enables quick, effortless opening and closing with a simple 90° rotation of the L-handle. The positive 90° stop ensures clear open/closed positioning, while the smooth PA-on-metal rotation provides consistent, reliable operation over tens of thousands of cycles. The self-lubricating PA material reduces friction and wear, extending the service life of the locking mechanism.

Application Fields

1. Electrical control cabinets, low-voltage distribution boxes, frequency converter enclosures and PLC equipment housings requiring keyed quarter-turn locking
2. CNC machine tool guards, automation equipment protective doors and industrial machinery access panels
3. Communication equipment cabinets, server boxes and signal transfer enclosures
4. Chemical processing equipment, laboratory analytical instruments and environmental monitoring control boxes (PA chemical resistance)
5. Outdoor monitoring equipment, weather-resistant instrument panels and coastal equipment enclosures (PA corrosion resistance)
6. Marine and boat equipment, RV accessories and outdoor fixtures requiring lightweight corrosion-resistant hardware
7. Agricultural machinery, farm equipment access panels and outdoor industrial enclosures
8. Sheet metal tool cabinets, industrial console doors and storage enclosures
9. Electronic equipment casings, consumer electronics and IoT device enclosures requiring electrically insulating locks
10. Applications requiring lightweight, corrosion-resistant, chemically resistant and left/right reversible keyed quarter-turn locking hardware

Installation & Maintenance Guidelines

Step-by-Step Installation Procedures

1. Determine the door hand configuration (left-hand or right-hand) and select the corresponding cutout position:
   • Red circle position: Left-hand (LH) door opening
   • Green circle position: Right-hand (RH) door opening
2. Mark and drill the Φ13mm mounting cutout at the appropriate LH or RH position on the cabinet door panel
3. Ensure the pressure plate (压板) and sealing components are properly positioned
4. Insert the M10 threaded shaft through the Φ13mm cutout from the front of the door panel
5. From the rear of the door panel, install the pressure plate and M10 nut, then tighten to secure the lock to the panel, adjusting for the specific panel thickness
6. Adjust the shaft length (69.5mm adjustable range) as needed for proper cam engagement
7. Install the appropriate cam on the C8 flat section of the shaft, aligning the flat for positive engagement
8. Test the quarter-turn 90° operation to verify smooth locking and unlocking
9. Verify the zinc alloy lock core operates correctly with the provided key
10. Confirm the handle orientation matches the door hand configuration (left or right)
11. Adjust the cam position if needed to achieve proper door latching and consistent gap spacing

Installation Quantity Recommendation

• Standard single cabinet door: Install 1 quarter-turn L-handle lock centered vertically on the door
• Tall or wide doors (>1200mm height): Install 2 locks (top and bottom) or 1 lock with additional hinge support
• Note: Ensure the cam is properly sized for the specific cabinet door-frame configuration to achieve secure latching

Maintenance Instructions

1. Suitable for both indoor and outdoor environments; PA material offers excellent corrosion and chemical resistance, but avoid prolonged exposure to extreme high temperatures (above 80°C continuously) as PA may soften
2. Wipe the black PA handle and housing periodically with a soft dry or slightly damp cloth to remove dust and grease; avoid harsh chemical solvents that may damage the nylon material
3. Apply a small amount of graphite or dry lubricant to the zinc alloy lock core annually to maintain smooth key operation; avoid oil-based lubricants that may attract dust
4. Check the M10 mounting nut and pressure plate tightness quarterly to prevent loosening from vibration
5. Inspect the PA housing and handle annually for any signs of cracking, deformation, UV degradation or excessive wear; replace the lock if any damage is detected
6. For prolonged direct outdoor UV exposure, inspect more frequently as PA may experience gradual UV degradation over time
7. Inspect the white zinc plated shaft and fastenings annually for any signs of corrosion or wear
8. Test the quarter-turn 90° operation quarterly to verify smooth locking and unlocking; the PA material is self-lubricating but the shaft may benefit from occasional dry lubricant
9. Verify that the cam remains securely attached to the C8 flat shaft and provides consistent latching force
10. For adjustable shaft length, periodically verify the shaft setting has not shifted and cam engagement remains proper

Product Summary

MZ320-1 is a quarter-turn L-handle industrial cabinet lock manufactured from high-quality PA (nylon/polyamide) engineering plastic with a zinc alloy keyed lock core and durable M10 threaded white zinc plated steel shaft (C8 flat, 69.5mm adjustable). Its PA construction provides lightweight corrosion resistance, chemical resistance and electrical insulation, the zinc alloy lock core ensures robust keyed security, the curved ergonomic L-handle offers comfortable high-torque gloved operation, the M10 threaded shaft with pressure plate mounting accommodates various panel thicknesses, and the left/right hand reversible design with dual cutout positions provides flexible installation for both door swing directions. With its 90° quarter-turn operation, self-lubricating PA material and versatile mounting options, it is an ideal locking solution for electrical cabinets, distribution boxes, machinery enclosures, communication equipment, chemical processing enclosures, outdoor equipment and various industrial applications requiring lightweight, corrosion-resistant keyed quarter-turn handle locking hardware.