MUL-T-LOCK 51100512 Double Cylinder Deadbolt 236X-HD2-05-S 3/8

( Brand: Mul-t-lock ), ( Manufacturer Part Number: 51100512 ), ( Model: 236X-HD2-05-S ), ( Color: Gold ), ( Items Included: Fixings, Hardware, Instructions ), ( Fixings Supplied: Yes ), ( Material: Metal ), ( Cross Bore Diameter: 2 3/8 In ), ( Item Depth: 3/4 In ), ( Suitable For: Door ), ( Type: Deadbolt ), ( Door Handing: No Handing ), ( Manufacturer Warranty: 1 Year ), ( Item Height: 2 In ), ( Style: Modern ), ( Features: Adjustable ), ( Ansi Grade: Ansi Grade 2 ), ( Finish: Polished ), ( Item Weight: 4 Lbs )

Review MUL T LOCK Double Cylinder Deadbolt Polished Gold 3/8 Inch

The **Mul-T-Lock 51100512 Double Cylinder Deadbolt (236x-HD2-05-S, 3/8")** is a premium-grade security solution designed to provide unparalleled protection for residential and commercial entry doors. This high-performance deadbolt features a **double-cylinder mechanism**, requiring a key for both the interior and exterior sides, which significantly enhances security by eliminating the risk of forced entry through a broken or unlocked glass panel. The **3/8-inch throw** ensures a deep, secure latch into the door frame, creating a tight seal that resists prying, kicking, or picking attempts, making it an ideal choice for homeowners seeking maximum defense against intruders.

Constructed from **durable, corrosion-resistant materials**, this deadbolt is built to withstand harsh environmental conditions, ensuring long-lasting reliability even in high-moisture or extreme temperature settings. The **smooth-operating mechanism** is engineered with precision, offering effortless engagement and disengagement with minimal effort, which is particularly beneficial for users with arthritis or limited mobility. The **HD2 series** designation indicates its compliance with **ANSI/BHMA Grade 2 standards**, a benchmark for residential security hardware, while the **236x model** incorporates a reinforced strike plate for added resistance against forced entry.

This deadbolt also features a **sleek, modern design** that seamlessly integrates with contemporary door styles, blending functionality with aesthetics. The **interchangeable keyway** allows for flexibility in key programming, accommodating various locksmith preferences, while the **smooth, low-maintenance finish** resists fingerprints and smudges, maintaining a clean appearance over time. Whether installed in a primary residence, a vacation home, or a commercial property, the **Mul-T-Lock 51100512** delivers a robust, dependable security solution that instills confidence in homeowners and property managers alike. Its combination of **high-security features, durability, and ease of use** makes it a standout choice for those prioritizing both safety and convenience.

**Pros and Cons of buying a Mul-T-Lock 51100512 Double Cylinder Deadbolt (236x-HD2-05-S, 3/8")**

1. **Enhanced Security** The double-cylinder design requires a key to unlock from both the inside and outside, making it harder for intruders to bypass with a credit card or forced entry. This is particularly useful for high-security applications like home offices, businesses, or doors leading to secure areas.

2. **Durability** Mul-T-Lock is a well-known brand in the security industry, known for producing high-quality, long-lasting locks. The 3/8" throw mechanism ensures a strong latch, reducing wear over time.

3. **Compatibility** This model is designed to work with standard door prep (3/8" bore), making it a versatile choice for most residential and commercial doors. It is also ANSI/BHMA Grade 1 rated, indicating strong performance under stress.

4. **Keyway Compatibility** The deadbolt uses a Schlage keyway, which is widely supported by locksmiths and hardware stores. This means you can easily obtain spare keys or replacements if needed.

5. **Aesthetic Options** The HD2 series comes in a brushed stainless steel finish, which offers a modern, sleek look that blends well with many door styles. It also resists fingerprints and corrosion better than some other finishes.

6. **Easy Installation** While installation requires some basic tools and skill, Mul-T-Lock deadbolts are generally straightforward to install, especially if the door prep is already correct. The manufacturer provides clear instructions.

7. **Fire Resistance** Some models in the Mul-T-Lock lineup are fire-rated, though you should verify this specific model s fire resistance rating if fire safety is a priority for your application.

8. **Key-in-Knob Compatibility** This deadbolt is designed to work with key-in-knob door hardware, which is common in residential settings. This ensures a cohesive look and function with your existing door hardware.

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1. **Key Dependency** The double-cylinder design means you must carry a key to exit the room in case of a power outage or emergency. This can be inconvenient for families with young children or elderly members who may forget keys.

2. **Higher Cost** Double-cylinder deadbolts are generally more expensive than single-cylinder or knob locks. The Mul-T-Lock 51100512 is positioned as a premium security product, so the price reflects its enhanced features.

3. **Installation Challenges** If your door does not have the correct prep (e.g., improper bore size or misaligned strike plate), installation can be difficult. Improper installation may compromise security or cause operational issues.

4. **Limited Smart Features** Unlike some modern deadbolts, this model does not offer smart features such as keyless entry, Bluetooth connectivity, or integration with smart home systems. If smart home security is a priority, you may need to explore alternative options.

5. **Key Management** With a double-cylinder lock, you must manage keys carefully. Losing a key could lock you out of your home or secure area, and rekeying may require a locksmith.

6. **Potential for Misuse** Some homeowners may disable the deadbolt for convenience, negating its security benefits. It s important to use the deadbolt as intended to maximize its protective value.

7. **Not ADA Compliant** This deadbolt is not designed for use on doors that require ADA compliance (e.g., public buildings or accessible entrances), as it does not meet the standards for lever handles or push-to-exit mechanisms.

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The Mul-T-Lock 51100512 double-cylinder deadbolt is an excellent choice for those prioritizing security, durability, and compatibility with standard door hardware. Its double-cylinder mechanism provides a high level of protection against forced entry, making it ideal for homes, businesses, or secure rooms where key-controlled access is necessary. The brand s reputation for quality and the ANSI Grade 1 rating further reinforce its reliability.

However, the key dependency and higher cost may be drawbacks for some users. If convenience and smart features are important, you might consider a single-cylinder deadbolt or a smart lock instead. For applications where security is the top priority and key management is feasible, this deadbolt is a strong recommendation.

- You need maximum security for a door that requires key access from both sides.

- You are willing to manage keys and ensure they are readily available in case of emergencies.

- You prefer a durable, high-quality product with a sleek finish.

- Your door setup is compatible with a 3/8" bore and key-in-knob hardware.

- You require ADA-compliant or lever-style handles.

- You prioritize smart home integration or keyless entry.

- You are uncomfortable with the inconvenience of carrying a key for exits.

- Your budget is limited, as there are more affordable single-cylinder options with similar security features.

Details:

MUL-T-LOCK Double Cylinder Deadbolt 236X-HD2-05-S Polished Gold 2 3/8.

part #: 51100512 price

• $150.00

specifications locsedoo:

• brand: Mul-t-lock
• mpn: 51100512
• model: 236x-hd2-05-s
• color: Gold
• items included: Fixings, Hardware, Instructions
• fixings supplied: Yes
• material: Metal
• cross bore diameter: 2 3/8 In
• item depth: 3/4 In
• suitable for: Door
• type: Deadbolt
• door handing: No Handing
• manufacturer warranty: 1 Year
• item height: 2 In
• style: Modern
• features: Adjustable
• ansi grade: Ansi Grade 2
• finish: Polished
• item weight: 4 Lbs

seller locsedoo:

• rating: 0.0%
• # reviews: 1
• city: Las Vegas, Nevada

offer locsedoo:

• best offers: True
• quantity: 1
• options: Ship-to-home
• sold: 0
• started: May 30, 2026
• availability: In Stock

payments locsedoo:

• wallet: Paypal
• other
• credit card: Visa

shipping locsedoo:

• class: Standard
• service: USPS Ground Advantage
• type: Calculated
• cost: $9.35
• transit: 5-11 Days
• carrier: USPS

returns locsedoo:

• policy: No Returns

general locsedoo:

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

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