# KM GROM KM137 Lightning Rod Mast Cross Connector with 40mm Bolt

**URL:** https://aio.lv/en/product--km-grom-km137--12454144
**Data updated:** 2026-05-18 02:53 (EEST)
**Category:** Home & DIY Accessories
**Manufacturer:** KM GROM
**Manufacturer code:** KM137
**EAN:** 5900111137105
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 6.49 €
**Prices and availability valid until:** 2026-07-22 23:59
**Price without VAT (21%):** 5.36 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--km-grom-km137--12454144

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

The KM GROM KM137 is a professional cross connector designed for lightning protection mast systems. Featuring a 40mm bolt, this component ensures a secure and reliable mechanical connection between conductors in grounding and lightning protection installations. It is constructed from durable materials to provide long-term stability and effective electrical conductivity in outdoor environments.

## Long description

The KM GROM KM137 Lightning Rod Mast Cross Connector is a specialized component engineered for the secure integration of lightning protection systems. This connector is specifically designed to facilitate a robust mechanical and electrical junction between conductors within a mast installation. Featuring a 40mm bolt, it provides the necessary clamping force to maintain structural integrity and consistent conductivity, ensuring that lightning protection systems remain effective under various environmental conditions.
Advantages
The primary advantage of this cross connector is its high-quality construction, which ensures long-term durability and resistance to atmospheric factors. By providing a reliable connection point, it minimizes the risk of electrical resistance buildup at joints, which is critical for the safe dissipation of lightning strikes. The design allows for straightforward installation, reducing labor time while maintaining high safety standards for grounding and lightning protection infrastructure.
Suitable for
Lightning protection mast systems
Grounding installations
Connecting conductors in external lightning protection networks
When it may not be suitable
This connector is not intended for use in applications requiring non-conductive mechanical fastening or in environments where the specific bolt length of 40mm is incompatible with the conductor diameter or mast structure. It should not be used for structural load-bearing purposes unrelated to lightning protection systems.
Key specifications
Component type: Cross connector for lightning rod masts
Bolt length: 40mm
Material: Corrosion-resistant metal alloy
Application: Mechanical and electrical conductor connection
How to use
To install the KM GROM KM137, position the conductors within the connector grooves to ensure proper contact. Insert the 40mm bolt through the designated opening and tighten it securely using appropriate manual or power tools. Ensure that the connection is firm and that the conductors are properly aligned to prevent mechanical stress or electrical discontinuity. Regular inspections should be performed to ensure the bolt remains tightened and the connection is free from oxidation.
What to consider before purchase
Verify the compatibility of the 40mm bolt length with your specific mast and conductor dimensions.
Ensure the material is compatible with the existing lightning protection system components to prevent galvanic corrosion.
Confirm the required quantity based on the number of connection points in your installation design.
Usage recommendations
Regularly inspect the connection points of your lightning protection system at least once a year to ensure that all fasteners remain secure and that no signs of environmental degradation are present.

## FAQ

### How much does the KM GROM KM137 Lightning Rod Mast Cross Connector cost, and is it available for purchase?

The price is 6.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 1163 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 14.07.2026 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 KM GROM 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 KM GROM 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/12454144/68756625_large.webp