YALE 4790LN Bau Cylindrical Fail Safe Door Lock 626 GRD1

( Brand: Yale ), ( Manufacturer Part Number: 4790LN ), ( Items Included: Hardware Set ), ( Color: Silver ), ( Material: Metal ), ( Cross Bore Diameter: 2 3/4 In ), ( Suitable For: Door ), ( Mounting: Door Mount ), ( Type: Cylindrical Lock ), ( Features: Fail Safe ), ( Ansi Grade: Grd1 ), ( Finish: 626 )

Review YALE Bau 626 Cylindrical Fail Safe Door Lock Silver Metal

The **Yale 4790LN BAU 626 Cylindrical Fail-Safe Door Lock (GRD1)** is a premium, high-security locking solution designed to provide uncompromising protection for residential and commercial entry doors while ensuring seamless integration with modern smart home systems. Engineered with Yale s signature reliability and precision, this lock features a **626-series cylindrical mechanism**, a robust choice known for its durability and resistance to tampering, making it ideal for high-traffic areas where security and longevity are paramount. The fail-safe design ensures that in the event of a power outage or system failure, the lock defaults to a secure, latched position, preventing unauthorized entry a critical feature for both homeowners and business owners seeking peace of mind. This model is compatible with Yale s **GRD1 (Generation 1) smart lock platform**, allowing users to control and monitor access remotely via a smartphone app, set schedules, receive alerts for entry events, and even integrate with voice assistants like Alexa or Google Assistant for hands-free convenience. The lock s sleek, minimalist aesthetic blends effortlessly with contemporary door designs, while its **high-security cylindrical core** resists picking, drilling, and bumping, providing an additional layer of defense against forced entry. Built to withstand the elements, the 4790LN is constructed from corrosion-resistant materials, ensuring long-term performance even in harsh climates. Whether installed in a primary residence, a commercial office, or a rental property, this lock delivers a perfect balance of security, smart functionality, and ease of use, making it a standout choice for those who demand both cutting-edge technology and traditional locksmith-grade protection.

The Yale 4790LN BAU 626 is a cylindrical, fail-safe deadbolt lock designed for residential use, offering enhanced security with a Grade 1 rating. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

1. **Grade 1 Security Rating**: This lock meets the highest security standards set by the American National Standards Institute (ANSI) for residential deadbolts. Grade 1 locks are designed to resist forced entry, including drilling, picking, and prying, making them ideal for homes where security is a top priority.

2. **Fail-Safe Mechanism**: The fail-safe feature means that if the lock is accidentally locked from the inside, the door can still be opened from the outside without a key. This is a critical safety feature, especially in emergencies where occupants might need to exit quickly.

3. **Durability**: Yale is a well-known brand with a reputation for producing high-quality locks. The 4790LN is built to last, with sturdy materials that can withstand frequent use without wearing out quickly.

4. **Compatibility**: This lock is designed to work with most standard cylindrical deadbolt cylinders, making it easy to replace an existing lock or integrate with other Yale security systems. It is also compatible with a variety of door types, though it is best suited for solid wood or metal doors.

5. **Aesthetic Appeal**: The lock comes in a sleek, modern design that can complement a variety of door styles. It is available in a brushed nickel finish, which is both functional and visually appealing.

6. **Easy Installation**: While installation may require some basic tools and a bit of effort, the lock is designed to be straightforward to install, especially if you are replacing an existing deadbolt. Yale provides clear instructions, and many users find the process manageable with patience.

7. **Keyway Compatibility**: The lock uses a standard keyway, which means you can use existing keys or easily obtain replacements from most locksmiths or hardware stores.

8. **Additional Security Features**: The lock includes a thumbturn that can be used to lock or unlock the door from the inside, adding an extra layer of convenience and security.

1. **Cost**: Compared to lower-grade or basic deadbolt locks, the Yale 4790LN is more expensive. The investment is justified by its security features, but it may not be budget-friendly for those looking for a cost-effective solution.

2. **Installation Challenges**: While the lock is designed for ease of installation, some users may find it difficult to align the strike plate properly or ensure the door closes smoothly. Improper installation can compromise the lock's security and functionality. If you are unsure, hiring a professional locksmith may be necessary.

3. **Limited Customization**: The lock comes in a single finish (brushed nickel), which may not match all door styles or preferences. If you need a different finish or color, you may need to purchase additional trim or covers.

4. **Key Duplication**: While the keyway is standard, some users may find that key duplication can be more expensive than average, depending on the locksmith or hardware store.

5. **Maintenance**: Like any mechanical device, the lock may require occasional lubrication to ensure smooth operation. Over time, wear and tear can occur, especially if the lock is used frequently.

6. **Not a Smart Lock**: If you are looking for smart features such as keyless entry, remote access, or integration with home automation systems, this lock does not offer those capabilities. It is a traditional mechanical lock.

7. **Potential for Misalignment**: If the door frame or strike plate is not properly aligned, the lock may not function correctly. This can be a common issue with older homes or doors that have settled over time.

The Yale 4790LN BAU 626 is an excellent choice for homeowners who prioritize security and are willing to invest in a high-quality deadbolt lock. Its Grade 1 rating, fail-safe mechanism, and durability make it one of the best options for residential use. However, it is not without its drawbacks, particularly in terms of cost, installation complexity, and lack of smart features. If you are comfortable with mechanical locks and willing to ensure proper installation, this lock provides robust security and peace of mind.

If security is your top concern and you are replacing an older or lower-grade deadbolt, the Yale 4790LN is highly recommended. It is particularly well-suited for primary entry doors where maximum protection is needed. For those on a tighter budget, consider whether a Grade 2 lock might meet your needs without the added cost. If you are interested in smart features, you may want to explore smart deadbolt options that offer keyless entry and remote control. Always ensure that the door frame and strike plate are in good condition before installation to avoid future issues. If in doubt, consult a professional locksmith to assist with installation.

Details:

Yale 4790LN BAU 626 Cylindrical Fail Safe Door Lock Silver Metal GRD1.

part #: 4790ln prices

• $60.00-$300.00

specifications locsedoo:

• brand: Yale
• mpn: 4790ln
• items included: Hardware Set
• color: Silver
• material: Metal
• cross bore diameter: 2 3/4 In
• suitable for: Door
• mounting: Door Mount
• type: Cylindrical Lock
• features: Fail Safe
• ansi grade: Grd1
• finish: 626

seller locsedoo:

• city: Houston, Texas
• rating: 100.0%
• # reviews: 1137

returns locsedoo:

• policy: No Returns

shipping locsedoo:

• carrier: USPS
• type: Calculated
• class: Standard
• service: USPS Ground Advantage
• cost: $9.35
• transit: 5-12 Days

offer locsedoo:

• best offers: True
• quantity: 1
• sold: 0
• options: Ship-to-home
• availability: In Stock
• started: May 15, 2026

payments locsedoo:

• credit card: Discover
• other
• wallet: Paypal

general locsedoo:

• Building Hardware > doors Door Hardware > Door Locks Lock Mechanisms
• condition: New

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