# Ergom N 21/H BK Polyamide Locknut PG21 Black

**URL:** https://aio.lv/en/product--ergom-e03dk-02010200601--12451793
**Data updated:** 2026-05-18 02:40 (EEST)
**Category:** Electronics Accessories
**Manufacturer:** Ergom
**Manufacturer code:** E03DK-02010200601
**EAN:** 5900003166886
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

The Ergom N 21/H BK is a high-quality polyamide locknut designed for PG21 cable glands. This black, durable plastic nut ensures a secure and reliable connection in electrical installations, providing excellent resistance to mechanical stress and environmental factors. Ideal for industrial and commercial wiring applications requiring a standard PG21 thread size.

## Long description

The Ergom N 21/H BK is a professional-grade polyamide locknut engineered specifically for PG21 cable glands. This component is essential for securing cable entries in electrical enclosures, junction boxes, and control panels, ensuring that the gland remains firmly in place even under vibration or mechanical stress. Manufactured from high-quality, durable polyamide, this black locknut offers robust performance and long-term reliability in various industrial and commercial electrical installations.
Advantages
The primary benefit of this polyamide locknut is its exceptional resistance to mechanical impact and environmental degradation. Its lightweight yet sturdy construction ensures a tight fit, preventing the loosening of cable glands over time. The material properties provide excellent insulation and chemical resistance, making it suitable for demanding environments where durability is paramount. Its standardized PG21 thread design allows for seamless integration with compatible cable glands, facilitating quick and efficient installation processes.
Suitable for
Securing cable glands in electrical junction boxes
Industrial control panel wiring
Commercial electrical installations
Outdoor and indoor cable management systems
When it may not be suitable
This locknut is designed specifically for PG21 thread sizes and will not fit glands with different thread standards such as metric or NPT. It is intended for standard electrical applications and may not be suitable for environments involving extreme heat or highly corrosive chemical exposure where specialized metal or high-temperature materials are required.
Key specifications
Thread size: PG21
Material: Polyamide
Color: Black
Application: Cable gland fastening
Resistance: Mechanical stress and environmental factors
How to use
To use the Ergom N 21/H BK, first insert the cable gland through the opening of the enclosure. Once the gland is positioned, thread the locknut onto the gland from the inside of the enclosure. Tighten the nut manually or with appropriate tools until it is firmly seated against the wall of the enclosure, ensuring the gland is locked securely in place. Do not overtighten to avoid damaging the plastic threads.
What to consider before purchase
Verify that your cable gland is compatible with the PG21 thread standard
Check the wall thickness of your enclosure to ensure sufficient thread length
Confirm the environmental conditions of your installation site
Usage recommendations
For optimal performance, ensure the locknut is tightened evenly to maintain the integrity of the cable gland seal and prevent moisture or dust ingress into the electrical enclosure.

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. 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 Ergom 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 Ergom 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/12451793/68754449_large.webp