# TDM Brass Locknut 121EN 3/4 inch

**URL:** https://aio.lv/en/product--tdmbrass-121en34--12504971
**Data updated:** 2026-06-10 09:36 (EEST)
**Category:** Nails, screws, self-tapping screws & dowels
**Manufacturer:** tdm\_brass
**Manufacturer code:** 121EN34
**EAN:** 2000511383928
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 3.49 €
**Prices and availability valid until:** 2026-07-26 23:59
**Price without VAT (21%):** 2.88 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--tdmbrass-121en34--12504971

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | Thursday | free |
| Pickup points | 07.07.2026 | 1.89 EUR |
| Courier delivery to door | 07.07.2026 | 4.99 EUR |

## Summary description

The TDM Brass 121EN 3/4 inch locknut is a high-quality threaded fitting designed for secure fastening in plumbing and heating systems. Made from durable brass, it ensures reliable connection stability and corrosion resistance. This component is essential for preventing loosening of threaded joints in various industrial and domestic piping applications, providing a robust and long-lasting seal.

## Long description

The TDM Brass 121EN 3/4 inch locknut is a professional-grade threaded fitting engineered for secure fastening in plumbing, heating, and industrial piping systems. Constructed from high-quality brass, this component provides exceptional mechanical strength and long-term resistance to corrosion, ensuring that threaded connections remain stable and leak-free under varying operational conditions. Its precise threading allows for easy installation, making it a reliable choice for maintaining the integrity of complex pipe networks.
Advantages
The primary benefit of this brass locknut is its superior durability and resistance to environmental factors, which prevents the degradation often seen in lower-quality materials. By effectively locking threaded joints in place, it eliminates the risk of loosening caused by vibration or thermal expansion. The robust brass construction ensures a tight fit that maintains system pressure and prevents fluid leakage, contributing to the overall safety and efficiency of your plumbing infrastructure.
Suitable for
Securing threaded pipe connections in domestic water supply systems
Fastening components in central heating installations
Industrial piping applications requiring vibration-resistant joints
Preventing the loosening of valves and fittings in plumbing assemblies
When it may not be suitable
This locknut is designed specifically for standard threaded pipe systems and may not be compatible with specialized plastic or non-threaded piping materials. It is also not intended for use in high-pressure steam environments or systems involving highly corrosive chemicals that could react with brass.
Key specifications
Material: High-quality brass
Size: 3/4 inch
Thread type: Standard pipe thread
Application: Plumbing and heating systems
Corrosion resistance: High
How to use
To install the TDM Brass 121EN locknut, first ensure that the pipe threads are clean and free of debris. Thread the locknut onto the pipe or fitting until it reaches the desired position. Use an appropriate wrench to tighten the nut firmly against the mating component or surface to secure the connection. Ensure that the nut is tightened sufficiently to prevent movement, but avoid excessive force that could damage the threads.
What to consider before purchase
Verify that your pipe size is exactly 3/4 inch to ensure a proper fit
Check the compatibility of your existing pipe material with brass fittings
Ensure you have the correct tools, such as an adjustable wrench, for installation
Confirm the operating pressure and temperature of your system are within standard limits
Usage recommendations
For optimal performance and to prevent seizing over time, it is recommended to use a suitable thread sealant or PTFE tape on the pipe threads before tightening the locknut. Regularly inspect the connection during routine maintenance to ensure it remains secure.

## FAQ

### How much does the TDM Brass 121EN 3/4 inch Locknut cost, and is it available for purchase?

The price is 3.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 247 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 Thursday 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 tdm\_brass 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 tdm\_brass 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. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12504971/68845724_large.webp