Product Overview
The Master Lock 3NKALF-6 series offers a set of six (6) keyed alike padlocks, meaning a single key operates all locks in the set. These padlocks are engineered with Master Lock's innovative BumpStop Advanced Cylinder Technology, designed to resist lock bumping, a common method of forced entry. The robust construction and advanced security features make these padlocks suitable for various applications requiring reliable security.
Each padlock features a 1-9/16 inch (41mm) wide reinforced laminated steel body, complemented by a black bumper for added protection. The shackle measures 1-1/2 inches (38mm) tall with a 9/32 inch (7mm) diameter, providing ample clearance for diverse locking needs. Dual ball bearings enhance pry resistance, and hardened steel bottom plates offer drill resistance, ensuring a high level of security.
Key Features
- Keyed Alike Convenience: All six padlocks operate with the same key, and twelve keys are included for convenience.
- BumpStop Advanced Cylinder Technology: Features a unique reverse rake tapered driver pin, high-performance springs, and tightly machined cylinder chambers to prevent lock bumping.
- Durable Construction: 1-9/16 inch (41mm) wide reinforced laminated steel body with a black bumper.
- Strong Shackle: 1-1/2 inch (38mm) tall, 9/32 inch (7mm) diameter shackle for secure fastening.
- Enhanced Pry Resistance: Dual ball bearing locking mechanism provides maximum resistance against prying attempts.
- Drill Resistance: Hardened steel bottom plates protect against drilling.
- Scratch Resistance: Top and bottom bumpers help prevent scratches and damage.
Setup and Installation
The Master Lock 3NKALF-6 padlocks are ready for immediate use. As they are keyed alike, any of the provided keys will open any of the six padlocks. This feature simplifies key management for multiple locking points.
Image: Six Master Lock 3NKALF-6 padlocks and two keys, illustrating the keyed alike feature and BumpStop Technology.
To install, simply place the shackle through the items you wish to secure (e.g., gate chains, shed doors, storage units) and press the shackle firmly into the lock body until it clicks into place. Ensure the shackle is fully engaged to secure the lock.
Image: Detailed dimensions of the Master Lock padlock, showing a 1-9/16 inch body width and 1-1/2 inch shackle height.
Image: Size comparison illustrating the relative dimensions of different Master Lock padlock models.
Operating Instructions
To open the padlock, insert one of the provided keys fully into the keyway. Turn the key clockwise until the shackle releases. Pull the shackle open. To close the padlock, align the shackle with the lock body and press it down firmly until it clicks, indicating it is locked. Remove the key by turning it counter-clockwise and pulling it out.
The BumpStop Advanced Cylinder Technology is an integral part of the lock's operation, providing enhanced security against bumping attempts. This technology works by preventing the transfer of force from a bump key to the internal pins, thus blocking cylinder rotation and keeping the lock secured.
Video: An animation demonstrating how Master Lock's BumpStop Technology works internally to prevent lock bumping and enhance security.
Maintenance
To ensure the longevity and smooth operation of your Master Lock padlocks, periodic maintenance is recommended. For locks used outdoors or in harsh environments, apply a silicone-based lubricant to the keyway and shackle mechanism every 3-6 months. This helps prevent corrosion and keeps the internal components moving freely.
Clean the exterior of the locks with a damp cloth to remove dirt and grime. Avoid using harsh chemicals or abrasive cleaners, as these can damage the finish. Ensure the keyway is free of debris before inserting the key.
Troubleshooting
- Key is difficult to insert or turn: Check the keyway for any obstructions. Apply a small amount of graphite or silicone-based lubricant into the keyway. Ensure you are using the correct key for the lock.
- Shackle is stuck or difficult to open/close: Ensure the key is fully inserted and turned completely to the open position. Lubricate the shackle mechanism where it enters the lock body.
- Lock feels stiff: This can often be resolved with lubrication. Regular maintenance helps prevent stiffness.
If issues persist after attempting these troubleshooting steps, please contact Master Lock customer support for further assistance.
Specifications
| Feature | Detail |
|---|---|
| Model Number | 3NKALF-6 |
| Brand | Master Lock |
| Lock Type | Key Lock |
| Special Feature | BumpStop Advanced Cylinder Technology, Keyed Alike |
| Body Material | Reinforced Laminated Steel |
| Shackle Material | Alloy Steel |
| Body Width | 1-9/16 inches (41mm) |
| Shackle Height | 1-1/2 inches (38mm) |
| Shackle Diameter | 9/32 inches (7mm) |
| Color | Black |
| Number of Pieces | 6 Padlocks, 12 Keys |
| Item Weight | 3.3 pounds (1.5 Kilograms) |
| Product Dimensions (L x W x H) | 1.75 x 1 x 3.26 inches |
Warranty and Support
Master Lock provides a limited lifetime warranty for these padlocks, ensuring quality and reliability. For warranty claims, product support, or any questions not covered in this manual, please refer to the official Master Lock website or contact their customer service department directly.
When contacting support, please have your product model number (3NKALF-6) and purchase information readily available.
