Master Lock 5NKA-4 Commercial Padlocks

Created by Roberto Forni

August 3, 2026

The Master Lock 5NKA-4 Commercial Padlocks are a set of four keyed alike locks designed for heavy-duty security needs. These padlocks are particularly popular in commercial and industrial settings, offering robust protection with their laminated steel bodies and advanced BumpStop technology. Compared to other products in the category, these padlocks stand out for their durability and convenience, as they allow multiple locks to be opened with a single key.

These padlocks feature a 2″ wide laminated steel body and a 1″ hardened boron alloy shackle, providing superior cut resistance. The non-rekeyable, 4-pin W1 cylinder enhances security by preventing picking. Additionally, the proprietary rustproofing ensures a longer lifespan, making these locks suitable for outdoor use. The inclusion of eight keys in the package is a notable advantage, offering ample spares for users.

Customer feedback for the Master Lock 5NKA-4 is overwhelmingly positive, with users often praising the heavy-duty construction and the convenience of having multiple keys. Compared to other products in the same category, these padlocks receive higher satisfaction ratings, particularly for their durability and security features.

When compared to the Master Lock 7804EURD Padlock Set, the 5NKA-4 offers a more robust build with its laminated steel body and advanced security features. While the 7804EURD is praised for its weather-resistant design, the 5NKA-4's BumpStop technology provides an extra layer of security that is highly valued by users.

In a side-by-side comparison with the H&S Snn243 Padlock, the Master Lock 5NKA-4 stands out for its keyed alike feature, which is often highlighted by customers as a major convenience. The H&S padlock, while also heavy-duty, does not offer the same level of convenience with its separate keys.

For those seeking a reliable and secure solution for commercial or industrial applications, the Master Lock 5NKA-4 is highly recommended. Its robust construction and keyed alike feature make it ideal for users who need to manage multiple locks with ease.