1. Locksets Door Hardware For Sale
  2. sku: 15248621180868772
  3. MARKS MK2620

MARKS MK2620 Nos Bks Single Cylinder Thumb Turnpiece Keys Pella

Mk2620 Marks Nos Bks Single Cylinder Thumb Turnpiece With 3 Keys Pella Brass

( Brand: Marks ), ( Manufacturer Part Number: MK2620 ), ( Model: MARKS PROFILE MK2620 ), ( Type: Single Cylinder ), ( Color: Yellow ), ( Items Included: Key ), ( Material: Brass ), ( Finish: Antique Brass ), ( Country Of Origin: United States ), ( Suitable For: Commercial, Entire Door )

Review MARKS Nos Bks Single Cylinder Thumb Turnpiece Keys Pella Brass

The **MK2620 NOS (New Old Stock) Pella Single Cylinder Thumb Turnpiece Keyed Entry Set** represents a refined blend of classic craftsmanship and timeless functionality, ideal for homeowners and restoration enthusiasts seeking both security and aesthetic appeal. This high-quality, never-used-installed (NOS) hardware features a **single-cylinder thumb turnpiece mechanism**, a design that combines ease of use with robust security, allowing for smooth operation with a simple push-and-turn motion while maintaining a secure latch when locked. Engineered by **Pella**, a trusted name in residential door hardware, this set exemplifies precision engineering with a durable brass construction that ensures longevity and resistance to wear, even in high-traffic environments. The **thumb turnpiece** itself is a standout feature, offering a sleek, modern look that complements a variety of architectural styles, from traditional to contemporary, while its ergonomic design provides a comfortable grip for effortless handling. The **keyed entry system** is designed with security in mind, featuring a reliable locking mechanism that resists tampering and unauthorized access, making it a practical choice for both interior and exterior doors. Whether integrated into a new installation or used in a restoration project, this set delivers a seamless blend of form and function, ensuring both security and visual harmony. Perfect for those who appreciate the balance between heritage craftsmanship and modern convenience, the MK2620 is a premium addition to any door hardware collection.

The **MK2620 NOS (New Old Stock) single-cylinder thumb turnpiece keyed Pella lock** is a classic mechanical lock known for its durability and historical charm. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros**

1. **Authenticity and Historical Value**

The MK2620 is a well-preserved, original Pella lock from the mid-20th century, often sought after by collectors and enthusiasts for its vintage appeal. If you value period-correct hardware, this lock adds character to older homes or restoration projects.

2. **Durability and Reliability**

Pella locks, particularly those from the mid-1900s, were built to last. The mechanical construction of the single-cylinder thumb turnpiece (often used on interior doors) is robust, and NOS units are likely to function well if properly maintained. Many of these locks have survived decades with minimal wear.

3. **Compatibility with Older Doors**

The MK2620 is designed to fit standard door preparations from its era, making it a practical choice for restoring or maintaining older homes. It typically requires a 2-3/8" bore and a 1-1/8" x 2-1/8" mortise, which aligns with many pre-1980s doors.

4. **Aesthetic Appeal**

The thumb turnpiece design is simple yet functional, offering a clean, utilitarian look that complements traditional or farmhouse-style interiors. The absence of modern electronics or complex mechanisms also appeals to those who prefer mechanical simplicity.

5. **Resale or Trade-In Value**

NOS locks, especially from reputable brands like Pella, hold value over time. If you decide to sell or trade it later, it may fetch a decent price among lock collectors or restoration enthusiasts.

6. **No Electronic Dependencies**

Unlike smart locks or electronic models, the MK2620 operates purely mechanically. This means it won t fail due to power outages, software glitches, or hacking vulnerabilities. It s a reliable choice for security-conscious buyers who prioritize simplicity.

7. **Easy to Maintain**

Mechanical locks like this require minimal upkeep regular lubrication of the tumblers and occasional cleaning of the keyway are usually sufficient. There are no batteries to replace or firmware to update.

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### **Cons**

1. **Limited Keying Options**

The MK2620 is a single-cylinder lock, meaning it only secures the inside of the door (the thumb turnpiece allows entry from the inside without a key). This makes it unsuitable for exterior doors where security from the outside is critical. For exterior use, a double-cylinder or deadbolt would be more appropriate.

2. **Key Duplication Challenges**

Finding a locksmith or key maker familiar with older Pella keyways can be difficult. The key profile may not match modern key machines, requiring specialized tools or a key blank from a vintage key supplier. This can add unexpected costs if you lose the key.

3. **Potential for Wear or Damage**

While NOS locks are often in good condition, they may show signs of age such as rust, sticky tumblers, or worn keyholes. Before purchasing, inspect the lock closely for:

- Rust or corrosion (especially in the keyway or tumblers).

- Stiff operation (indicating dryness or lack of lubrication).

- Visible damage to the thumb turnpiece or strike plate.

If the lock is seized or damaged, restoration may be required, adding to the cost.

4. **Incompatibility with Modern Security Standards**

Modern security often prioritizes features like anti-saw plates, reinforced strike plates, or resistance to drilling. The MK2620 lacks these advanced security measures, making it less suitable for high-security applications. For example, it may not meet insurance requirements for exterior doors in some regions.

5. **Limited Availability of Replacement Parts**

If the lock fails, finding exact replacement parts (e.g., a new thumb turnpiece or latch) can be challenging. Pella may still produce some parts, but they may not be as readily available as parts for newer locks.

6. **Key Loss Risks**

Losing the key to a single-cylinder lock can be problematic because you ll need the original key to rekey the lock (unless you have a spare). Unlike modern locks with backup codes or key fobs, there s no alternative access method.

7. **Installation May Require Adjustment**

Older locks like the MK2620 may not fit perfectly in modern doors due to differences in door thickness or preparation. You may need to sand the door edges, adjust the strike plate, or use spacers to ensure a proper seal and smooth operation.

8. **No Tamper-Evident Features**

Unlike modern locks with tamper-evident screws or plates, the MK2620 offers no visual indication if someone has attempted to pick or force it. This makes it less ideal for security-conscious applications where evidence of tampering is important.

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### **Conclusion**

The **MK2620 NOS Pella lock** is an excellent choice if you prioritize **authenticity, simplicity, and durability** for an interior door or a restoration project. Its mechanical reliability and historical value make it a compelling option for collectors or those working on vintage homes. However, its **lack of modern security features, limited keying flexibility, and potential maintenance challenges** mean it s not ideal for exterior doors or high-security applications.

If you re restoring an older home and need a functional, period-appropriate lock for an interior door (e.g., a closet, bathroom, or interior hallway), the MK2620 is a solid investment. For exterior doors, a **modern deadbolt or double-cylinder lock** would be a safer and more practical choice.

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### **Recommendation**

- **Buy the MK2620 if:**

- You re restoring an older home and need a NOS lock for an interior door.

- You value the aesthetic and historical significance of a mid-century Pella lock.

- You re comfortable with mechanical locks and don t require advanced security features.

- You plan to keep the lock long-term and have access to a key maker familiar with vintage keyways.

- **Avoid the MK2620 if:**

- You need the lock for an exterior door where security is a priority.

- You require modern security features like anti-drill plates or reinforced strikes.

- You re unsure about the lock s condition and cannot inspect it thoroughly before purchasing.

- You frequently lose keys and want a lock with backup access options.

- **Alternative Considerations:**

- For **interior doors**, consider a **modern single-cylinder deadbolt** (e.g., Schlage or Kwikset) if you want better keying flexibility and security.

- For **exterior doors**, opt for a **double-cylinder deadbolt** (e.g., Medeco or Mul-T-Lock) or a **smart lock** if you want electronic features.

- If you re restoring a door, ensure the lock fits properly and test its operation before finalizing the purchase.

Before buying, **inspect the lock closely** for rust, stiffness, or damage, and confirm that the key works smoothly. If possible, test the lock in the door to ensure proper alignment with the strike plate. For peace of mind, consider purchasing from a reputable seller with a return policy or warranty.

Details:

There are no instructions and a screw for the assembly is not available. Any questions please feel free to ask. They are new without the box. These are BKS brand locks with keys.

part #: mk2620 prices

  • $45.00-$60.00

specifications locsedoo:

  • brand: Marks
  • mpn: Mk2620
  • model: Marks Profile Mk2620
  • type: Single Cylinder
  • color: Yellow
  • items included: Key
  • material: Brass
  • finish: Antique Brass
  • country of origin: United States
  • suitable for: Commercial, Entire Door

seller locsedoo:

  • rating: 100.0%
  • # reviews: 2502
  • city: Harvey, Iowa

general locsedoo:

  • condition: Open box
  • Building Hardware > doors Door Hardware > Door Locks Lock Mechanisms

returns locsedoo:

  • policy: Returns Accepted
  • time: 30 Days
  • method: Money back
  • paid by: Buyer

shipping locsedoo:

  • carrier: USPS
  • type: Calculated
  • transit: 4-9 Days
  • class: Standard
  • cost: $0.00
  • service: USPS Ground Advantage

offer locsedoo:

  • options: Ship-to-home
  • started: April 5, 2026
  • quantity: 2
  • sold: 0
  • availability: In Stock

payments locsedoo:

  • credit card: Mastercard
  • wallet: Google-pay
  • other
type: single cylinder, items included: key, finish: antique brass, country of origin: united states, suitable for: commercial, entire door,
category: home & garden > building hardware > doors door hardware > door locks lock mechanisms, color: yellow, material: brass, sku: 15248621180868772,
Marks MK2620 Is Similar To:
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2 offers $45.00–$60.00 USD
  • New. Offer #1 priced at $60.00 + $0.00 shipping estimate = $60.00* total. Marks Profile Single Cylinder Turnpiece.FREE SHIPPING
  • New. Offer #2 priced at $45.00 + $0.00 shipping estimate = $45.00* total. Choose the Marks for a top-quality lock that adds style and function to your home or business. This Marks Profile single cylinder lock is the perfect addition to any commercial or residential door.FREE SHIPPING

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