header-product Coupler lock MASTER LOCK Universal trailer coupler lock Silver Flat key
41.49 €

Coupler lock MASTER LOCK Universal trailer coupler lock Silver Flat key

Coupler lock MASTER LOCK Universal trailer coupler lock Photo 1
Coupler lock MASTER LOCK Universal trailer coupler lock Photo 2
Coupler lock MASTER LOCK Universal trailer coupler lock Photo 1
Coupler lock MASTER LOCK Universal trailer coupler lock Photo 2
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Coupler lock MASTER LOCK Universal trailer coupler lock Silver Flat key

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Coupler lock MASTER LOCK Universal trailer coupler lock Silver Flat key

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Short description

The MASTER LOCK Universal trailer coupler lock is designed to secure your trailer with a durable silver finish. It features a flat key lock mechanism for added security. Ideal for protecting your trailer from theft, this coupler lock is a reliable choice for any trailer owner.
Available at price 41.49 €: 1 pcs.
Total available for order: 18 pcs.
Warranty: 2 Years
SKU: 6832395
Manufacturer: MASTERLOCK
delivery
to the Customer Service Center at Kengaraga 2b, Riga
19.06.2026 {{selectedOffer.officeDeliveryString}}
free
Customer service center
2b. Kengaraga str., Riga, Latvia, LV-1063
19.06.2026 {{selectedOffer.officeDeliveryString}}
free
Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!
26.06.2026 {{selectedOffer.courierDeliveryString}}
From 4.99 € (Weight: 1.53 kg)
Parcel couriers
Latvijas Pasts pakomāts / Unisend / DPD Paku skapis / Omniva / Venipak Pickup / Venipak Locker / Latvijas Pasts nodaļa
26.06.2026 {{selectedOffer.parcelStationDeliveryString}}
From 1.99 €
payment
Payment Methods:
Bank transfer, Bank cards on-line, Apple Pay, Google Pay
Together cheaper
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Product information

Description

The MASTER LOCK No. 377EURDAT is a universal trailer coupler lock with a silver finish and a flat key mechanism, designed to secure common trailer couplers. It fits 48 mm, 51 mm and most 59 mm couplers and incorporates a locking mechanism engineered to resist picking, prying, rust and corrosion. The product is backed by a Limited Lifetime Warranty from the manufacturer.

Advantages

The lock fits multiple common coupler diameters, uses a flat key for operation, and is constructed to resist picking and prying. Its surface finish helps resist rust and corrosion, and the design allows straightforward installation and removal.

Suitable for

  • Securing trailers with 48 mm couplers
  • Securing trailers with 51 mm couplers
  • Securing trailers with most 59 mm couplers
  • Owners who prefer a flat key locking mechanism

Key specifications

  • Brand: MASTER LOCK
  • Model / MPN: 377EURDAT
  • EAN: 3520190922793
  • Compatible coupler diameters: 48 mm, 51 mm, most 59 mm
  • Lock type: Flat key mechanism
  • Colour: Silver
  • Corrosion resistance: Yes (resists rust and corrosion)

How to use

Place the coupler lock into the trailer coupler opening so the lock body spans the coupler throat, then insert and turn the flat key to engage the locking mechanism. Verify the lock is securely seated and the key removes only after full engagement. To remove, insert the flat key, turn to unlock and withdraw the lock from the coupler.

Usage recommendations

The lock is intended for use on compatible trailer couplers (48 mm, 51 mm and most 59 mm). Regularly inspect the lock for signs of wear or corrosion and lubricate the keyway periodically according to manufacturer instructions to maintain smooth operation.

Specifications

Product colour:
Silver
All features
Easy to install:
Yes
Lock type:
Flat key
Product type:
Coupler lock
Easy to remove:
Yes
Best uses:
Trailer, Truck
Corrosion resistant:
Yes
Compatible trailer coupler holes:
48, 51, 59
Number of lock keys included:
2 pc(s)

Design

Product colour:
Silver

Description

Machine translation. Load original

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Stock data
Warehouse Stock Delivery to the store Store Price
WH334 1 19.06.2026 Best delivery 41.49 € Best price
WH354 1 30.06.2026 49.49 €
EU3 8 19.06.2026 Best delivery 61.99 €
Available only for legal entities
Warehouse Stock Delivery to the store Store Price
WH109 8 07.07.2026 75.49 €
41.49 €
Stock: 1
Delivery Date: 19.06.2026 Best delivery
Warehouse: WH334
49.49 €
Stock: 1
Delivery Date: 30.06.2026
Warehouse: WH354
61.99 €
Stock: 8
Delivery Date: 19.06.2026 Best delivery
Warehouse: EU3
Available only for legal entities
75.49 €
Stock: 8
Delivery Date: 07.07.2026
Warehouse: WH109

Customer reviews

Customer questions

FAQ

How much does the Coupler lock MASTER LOCK Universal trailer coupler lock cost, and is it available for purchase?

The price is 41.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 18 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 19.06.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

What is the warranty period?

All MASTERLOCK products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized MASTERLOCK service centers and through AiO.lv

Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. We will assist with consultation, warranty claim processing, and coordination with certified service centers.

How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.
warranty
14-Day Return Policy We are confident in our quality, but if the purchase doesn’t fit — you have 14 days to return the product with peace of mind.
shipping
Fast Delivery Get your orders as quickly as possible — right to your door, parcel lockers, or pickup points across Latvia and the EU.
payment
Secure Payment Pay the way you prefer: cash, VISA, MasterCard, Apple Pay, Google Pay, bank transfer, or 0% installment plan.
warranty
Quality Since 2008 AiO.lv has been on the market for over 18 years and has earned trust — with more than 6000 genuine positive reviews on Google.